Grammage

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Grammage and basis weight, in the pulp and paper industry, are the area density of a paper product, that is, its mass per unit of area. Two ways of expressing the area density of a paper product are commonly used:

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Grammage

In the metric system, the mass per unit area of all types of paper and paperboard is expressed in terms of grams per square metre (g/m2). This quantity is commonly called grammage in both English and French, [2] though printers in most English-speaking countries still refer to the "weight" of paper.

Typical office paper has 80 g/m2 (0.26 oz/sq ft), therefore a typical A4 sheet (1⁄16 of a square metre) weighs 5 g (0.18 oz). The abbreviation "gsm" instead of the standard g/m2 symbol is also widely encountered in English-speaking countries.

Typically grammage is measured in paper mill on-line by a quality control system and verified by laboratory measurement.

Basis weight

Basis weight of paper is the density of paper expressed in terms of the mass (in pound) of a ream of paper of given dimensions and a sheet count. The American and the traditional British systems are largely the same, with only minor differences: the paper dimensions and the sheet count are different.

United States

In the US system, the weight is specified in avoirdupois pounds and the sheet count of a paper ream is usually 500 sheets. However, the mass specified is not the mass of the ream that is sold to the customer. Instead, it is the mass of the uncut "basis ream" in which the sheets have some larger size (parent size). Often, that is a size used during the manufacturing process before the paper is cut to the dimensions in which it is sold. So, to compute the mass per area, one must know

The standard dimensions and sheet count of a ream vary according to the type of paper. These "uncut" basis sizes are not normally labelled on the product, are not formally standardized, and therefore have to be guessed or inferred somehow from trading practice. Historically, this convention is the product of pragmatic considerations such as the size of a sheet mold.

By using the same basis sheet size for the same type of paper, consumers can easily compare papers of differing brands. Twenty-pound bond paper is always lighter and thinner than 32-pound bond, no matter what its cut size, and 20-pound bond letter size and 20-pound bond legal size papers are the same weight paper with a different cut size.

However, a sheet of common copy paper that has a basis weight of 20 pounds (9.1 kg) does not have the same mass as the same size sheet of coarse paper (newsprint). In the former case, the standard ream is 500 sheets of 17-by-22-inch (432 by 559 mm) paper, and in the latter, 500 sheets of 24-by-36-inch (610 by 914 mm) paper. Here are some basic ream sizes for various types of paper. Units are inches except where noted.

Paper type Paper size
(inches)		Sheets per ream
Bond, writing, ledger17× 22500
Manuscript cover18× 31500
Blotting19× 24500
Box cover20× 24500
Cover20× 26500 or 1000
Watercolour22× 30500
Bristol and tag22+1⁄2× 28+1⁄2500
Tissue24× 36480
Newsprint24× 36500
Hanging, waxing, bag, etc.24× 36500
Book, text, offset25× 38500
Index bristol25+1⁄2× 30+1⁄2500
Paperboard (all types)12× 121000 (1000 sq ft per ream)

Sheets 17 by 22 inches (432 by 559 mm) can be cut into four 8+1⁄2-by-11-inch (216 by 279 mm) sheets, a standard for business stationery known conventionally as letter sized paper. So, the 17-by-22-inch (432 by 559 mm) ream became commonly used. The 25-by-38-inch (635 by 965 mm) book-paper ream developed because such a size can easily be cut into sixteen 6-by-9-inch (152 by 229 mm) book sized sheets without significant waste (nominally 6+1⁄4-by-9+1⁄2-inch (159 by 241 mm) before trimming and binding).

Early newsprint presses printed sheets 2 by 3 feet (610 by 914 mm) in size, and so the ream dimensions for newsprint became 24 by 36 inches (610 by 914 mm), with 500 sheets to a ream. Newsprint was made from ground wood pulp, and ground wood hanging paper (wallpaper) was made on newsprint machines. Newsprint was used as wrapping paper, and the first paper bags were made from newsprint. The newsprint ream standard also became the standard for packaging papers, even though in packaging papers kraft pulp, rather than ground wood, was used for greater strength.

Paper weight is sometimes stated using the "#" symbol. For example, "20#" means "20 pounds per basis ream of that kind of paper". When the density of a ream of paper is given in pounds, it is often accompanied by its "M weight" (M is 1000 in Roman numerals). The M weight is the weight (in pounds) of 1000 cut sheets. Paper suppliers will often charge by M weight, since it is always consistent within a specific paper size, and because it allows a simple weight calculation for shipping charges.

For example, a 500-sheet ream of 20# 8+1⁄2-by-11-inch (216 by 279 mm) copy paper may be specified "10 M". 1000 cut sheets (or two reams) will weigh 10 lb (4.5 kg), half of the four reams of cut paper resulting from the 20# basis ream of 17-by-22-inch (432 by 559 mm) paper.

United Kingdom

Overview of the traditional British system

Like the American system, the traditional British system also involves the use of basis weight to express the area density of paper (and, indirectly, paper thickness) in the course of buying and selling paper. The British paper industry exclusively used basis weight before 1968. [3]

In the traditional British system, basis weight is also expressed in terms of the weight of an imaginary ream of paper of a certain size.  The underlying concept is that a ream of paper of the stated paper size and of the same thickness as the paper the parties are dealing with would have the stated weight. The weight is expressed in pound. As to paper sizes (basis sizes), they can, theoretically, be any sizes, but, by custom, a number of common sizes emerged. In the 1960s, even the metric A1 [4] and A2 [5] had been used as basis sizes alongside the British ones.

The following are common [6] [7] [8] British basis sizes (sizes of British uncut paper):

Common British basis sizes
Note 1:
The Italicised writing‑paper and printing‑paper sizes were in use only prior to the 1925 standardisation [9] of writing‑paper and printing‑paper sizes. The 1925 standardisation did not apply to wrapping‑paper sizes.

Note 2:
The underlined writing‑paper and printing‑paper sizes were in use after the 1925 standardisation but were not adopted as standard sizes [10] by British Standards Institution specification number 730 of 1937.

Note 3:
The wrapping‑paper sizes marked with ‘*’ were not adopted as standard sizes by British Standards Institution specification number 730 of 1937. [10]

Writing paper
Atlas26″ × 34″
Copy16⁠1/2⁠″ × 20″
Double elephant
(adopted by British Standards Institution specification number 730 of 1937 but not the 1925 standardisation)		27″ × 40″
Double imperial30″ × 44″
Double large post21″ × 33″
Double post
(adopted by British Standards Institution specification number 730 of 1937 but not the 1925 standardisation)		19″ × 30″
(prior to re‑definition by British Standards Institution specification number 730 of 1937, 19″ × 30⁠1/2⁠″)
Double pott15″ × 25″
Double small demy
(known as ‘double demy’ before the 1925 standardisation)		20″ × 31″
Double small foolscap
(known as ‘double foolscap’ before British Standards Institution specification number 730 of 1937)
(‘foolscap’ is sometimes shortened to ‘’cap’ or ‘cap’)		16⁠1/2⁠″ × 26⁠1/2⁠″
Double small royal
(known as ‘double royal’ before the 1925 standardisation)		24″ × 38″
Elephant23″ × 28″
Imperial22″ × 30″
Large post16⁠1/2⁠″ × 21″
Pinched post14⁠3/4⁠″ × 18⁠1/2⁠″
Post
(adopted by British Standards Institution specification number 730 of 1937 but not the 1925 standardisation)		15″ × 19″
(prior to re‑definition by British Standards Institution specification number 730 of 1937, 15⁠1/4⁠″ ×19″)
Pott12⁠1/2⁠″ × 15″
Sheet‑and‑a‑half small foolscap
(known as ‘sheet‑and‑a‑half foolscap’ before British Standards Institution specification number 730 of 1937)
(‘foolscap’ is sometimes shortened to ‘’cap’ or ‘cap’)		13⁠1/4⁠″ × 24⁠3/4⁠″
(before the 1925 standardisation, 13⁠1/4⁠″ × 24⁠1/2⁠″)
Sheet‑and‑a‑third small foolscap
(introduced by the 1925 standardisation)
(known as ‘sheet‑and‑a‑third foolscap’ before British Standards Institution specification number 730 of 1937)
(‘foolscap’ is sometimes shortened to ‘’cap’ or ‘cap’)		13⁠1/4⁠″ × 22″
Small demy
(known as ‘demy’ before the 1925 standardisation)		15⁠1/2⁠″ × 20″
Small foolscap
(known as ‘foolscap’ before British Standards Institution specification number 730 of 1937)
(‘foolscap’ is sometimes shortened to ‘’cap’ or ‘cap’)		13⁠1/4⁠″ × 16⁠1/2⁠″
Small medium
(known as ‘medium’ before the 1925 standardisation)		17⁠1/2⁠″ × 22″
Small post
(introduced by the 1925 standardisation)		14⁠1/2⁠″ × 18⁠1/2⁠″
Small royal
(known as ‘royal’ before the 1925 standardisation)		19″ × 24″
Super royal19″ × 27″
(before the 1925 standardisation, 19⁠1/4⁠″ × 27″)
Printing paper
Copy16⁠1/2⁠″ × 20″
Crown15″ × 20″
Demy17⁠1/2⁠″ × 22⁠1/2⁠″
Double crown20″ × 30″
Double demy22⁠1/2⁠″ × 35″
Double elephant
(also known as ‘double large royal’)
(adopted by British Standards Institution specification number 730 of 1937 but not the 1925 standardisation)		27″ × 40″
Double globe28″ × 38″
Double imperial30″ × 44″
Double foolscap
(known as ‘double large foolscap’ after the 1925 standardisation and before being re‑named by British Standards Institution specification number 730 of 1937)
(‘foolscap’ is sometimes shortened to ‘’cap’ or ‘cap’)		17″ × 27″
Double large post21″ × 33″
Double medium23″ × 36″
Double post
(adopted by British Standards Institution specification number 730 of 1937 but not the 1925 standardisation)		19″ × 30″
(prior to re‑definition by British Standards Institution specification number 730 of 1937, 19⁠1/4⁠″ × 31⁠1/2⁠″)
Double pott15″ × 25″
Double royal25″ × 40″
Elephant23″ × 28″
Foolscap
(known as ‘large foolscap’ after the 1925 standardisation and before being re‑named by British Standards Institution specification number 730 of 1937)
(‘foolscap’ is sometimes shortened to ‘’cap’ or ‘cap’)		13⁠1/2⁠″ × 17″
Imperial22″ × 30″
Large post16⁠1/2⁠″ × 21″
Large royal
(introduced by the 1925 standardisation)		20⁠1/2⁠″ × 27″
(prior to re‑definition by British Standards Institution specification number 730 of 1937, 20″ × 27″)
Medium18″ × 23″
Music demy14⁠3/8⁠″ × 20⁠3/4⁠″
Post
(adopted by British Standards Institution specification number 730 of 1937 but not the 1925 standardisation)		15″ × 19″
(prior to re‑definition by British Standards Institution specification number 730 of 1937, 15⁠1/2⁠″ × 19⁠1/4⁠″)
Pott12⁠1/2⁠″ × 15″
Quad crown30″ × 40″
Quad demy35″ × 45″
Quad foolscap
(known as ‘quad large foolscap’ after the 1925 standardisation and before being re‑named by British Standards Institution specification number 730 of 1937)
(‘foolscap’ is sometimes shortened to ‘’cap’ or ‘cap’)		27″ × 34″
Quad globe38″ × 56″
Quad pott25″ × 30″
Quad royal40″ × 50″
Royal20″ × 25″
Super royal20⁠1/2⁠″ × 27⁠1/2⁠″
Wrapping paper
Bag cap20″ × 24″
(prior to re‑definition by British Standards Institution specification number 730 of 1937, 19⁠1/2⁠″ × 24″)
Casing36″ × 46″
(across the island of Ireland, 36″ × 48″)
Double bag cap*24″ × 39″*
Double crown20″ × 30″
Double double imperial45″ × 58″
Double elephant*31″ × 46″*
Double imperial29″ × 45″
Double medium23″ × 36″
Double small cap*25″ × 34″*
Double small hand*20″ × 29″*
Elephant*24″ × 32″*
Extra large casing40″ × 48″
Haven cap*
(sometimes called ‘havon cap’)		21″ × 26″*
Imperial22⁠1/2⁠″ × 29″
Kent cap*18″ × 21″*
Lumber hand*17⁠1/2⁠″ × 22⁠1/2⁠″*
Quad crown30″ × 40″
Quad foolscap*
(known as ‘quad large foolscap’ after the 1925 standardisation and before British Standards Institution specification number 730 of 1937)
(‘foolscap’ is sometimes shortened to ‘’cap’ or ‘cap’)		27″ × 34″*
Quad royal*40″ × 50″*
Quad small hand*30″ × 40″*
Royal*20″ × 25″*
Saddleback36″ × 45″
Small cap*17″ × 25″*
Small hand*15″ × 20″*
(No name)20″ × 24″*
(No name)20″ × 28″*
(No name)21″ × 31″*
(No name)21″ × 34″*
(No name)22″ × 32″*
(No name)22″ × 35″*
(No name)23″ × 34″*
(No name)24″ × 30″*
(No name)24″ × 36″*
(No name)24″ × 40″*
(No name)26″ × 36″*
(No name)28″ × 45″*
(No name)29″ × 44″*
(No name)30″ × 38″*
(No name)30″ × 46″*
(No name)34″ × 36″*
(No name)36″ × 36″*
(No name)36″ × 48″*
(No name)38″ × 48″*
(No name)45″ × 56″*

One ream in the context of basis weight (basis ream) can be 480 sheets, 500 sheets, 504 sheets, or 516 sheets: there is no fixed rule on when a certain definition was applied; however, starting from the 1950s, [11] the trend of moving towards 500 sheets emerged.

Basis weight is commonly expressed in terms of pound per ream of paper of a certain size, in the format of ‘[number]lb [paper size]’ (e. g., ‘21lb large post’ (‘21 pounds per ream of large post paper’)). Since there are basis reams of different sizes, unless the context leaves no room for ambiguity, the number of sheets in the basis ream is also given after the paper size to avoid misunderstanding: in such case, basis weight is expressed in the format of ‘[number]lb [paper size] [number of sheets of paper in the basis ream]’, such as ‘21lb large post 480’ (‘21 pounds per 480‑sheet ream of large post paper’). In the United Kingdom, ‘#’ has never been used to express paper weight because it is called ‘hash’, instead of ‘pound’, in British English.

Demy traditionally plays the role of the default basis size for expressing basis weights: in the British paper industry, there was a device, called ‘demy scale’, that was used to measure the weights of different paper samples in pound per ream of demy paper (480‑sheet, 500‑sheet, and 516‑sheet reams). [12]

Below is a list of common [11] basis weights of paper stocked by British paper merchants:

Common British basis weights and their metric and American equivalents
Writing paper
Common British basis weights

(various paper sizes and ream sizes)

Equivalent weight of a 500‑sheet ream of large post paper, a British uncut writing paper commonly used to express the basis weight of writing paper

(rounded to the nearest quarter)

(a common British basis for intra‑category comparison)

Equivalent weight of a 500‑sheet ream of demy paper, a British uncut printing paper commonly used by default to express the basis weight of different types of paper [a]

(rounded to the nearest quarter)

(a common British basis for cross‑category comparison)

Equivalent grammage

(rounded to the nearest one)

Equivalent weight of a 500‑sheet ream of bond paper, an American uncut paper commonly used to express the basis weight of paper

(rounded to the nearest quarter)

(a common American basis for cross‑category comparison)

11lb large post 48011⁠1/2⁠lb large post13lb demy46gsm12⁠1/4⁠lb bond
11lb large post 50011lb large post12⁠1/2⁠lb demy45gsm11⁠3/4⁠lb bond
12lb large post 50012lb large post13⁠1/2⁠lb demy49gsm13lb bond
14lb large post 48014⁠1/2⁠lb large post16⁠1/2⁠lb demy59gsm15⁠3/4⁠lb bond
15lb large post 48015⁠3/4⁠lb large post17⁠3/4⁠lb demy63gsm16⁠3/4⁠lb bond
15lb large post 50015lb large post17lb demy61gsm16⁠1/4⁠lb bond
15lb large post 50415lb large post17lb demy60gsm16lb bond
17lb large post 48017⁠3/4⁠lb large post20lb demy72gsm19lb bond
18lb large post 48018⁠3/4⁠lb large post21⁠1/2⁠lb demy76gsm20⁠1/4⁠lb bond
18lb large post 50018lb large post20⁠1/2⁠lb demy73gsm19⁠1/2⁠lb bond
18lb large post 50417⁠3/4⁠lb large post20⁠1/4⁠lb demy72gsm19⁠1/4⁠lb bond
19lb large post 48019⁠3/4⁠lb large post22⁠1/2⁠lb demy80gsm21⁠1/4⁠lb bond
20lb large post 48020⁠3/4⁠lb large post23⁠3/4⁠lb demy85gsm22⁠1/2⁠lb bond
21lb large post 48022lb large post24⁠3/4⁠lb demy89gsm23⁠1/2⁠lb bond
21lb large post 50021lb large post23⁠3/4⁠lb demy85gsm22⁠3/4⁠lb bond
21lb large post 50420⁠3/4⁠lb large post23⁠3/4⁠lb demy85gsm22⁠1/2⁠lb bond
22lb large post 48023lb large post26lb demy93gsm24⁠3/4⁠lb bond
22lb large post 50421⁠3/4⁠lb large post24⁠3/4⁠lb demy89gsm23⁠1/2⁠lb bond
23lb large post 48024lb large post27⁠1/4⁠lb demy97gsm25⁠3/4⁠lb bond
23lb large post 50023lb large post26⁠1/4⁠lb demy93gsm24⁠3/4⁠lb bond
23lb large post 50422⁠3/4⁠lb large post26lb demy93gsm24⁠1/2⁠lb bond
24lb large post 48025lb large post28⁠1/2⁠lb demy101gsm27lb bond
24lb large post 50423⁠3/4⁠lb large post27lb demy97gsm25⁠3/4⁠lb bond
25lb large post 48026lb large post29⁠1/2⁠lb demy106gsm28lb bond
25lb large post 50025lb large post28⁠1/2⁠lb demy101gsm27lb bond
26lb large post 48027lb large post30⁠3/4⁠lb demy110gsm29⁠1/4⁠lb bond
26lb large post 50425⁠3/4⁠lb large post29⁠1/4⁠lb demy105gsm27⁠3/4⁠lb bond
27lb large post 48028⁠1/4⁠lb large post32lb demy114gsm30⁠1/4⁠lb bond
27lb large post 50426⁠3/4⁠lb large post30⁠1/2⁠lb demy109gsm29lb bond
28lb large post 48029⁠1/4⁠lb large post33⁠1/4⁠lb demy118gsm31⁠1/2⁠lb bond
28lb large post 50427⁠3/4⁠lb large post31⁠1/2⁠lb demy113gsm30lb bond
30lb large post 48031⁠1/4⁠lb large post35⁠1/2⁠lb demy127gsm33⁠3/4⁠lb bond
22lb double large post 50011lb large post12⁠1/2⁠lb demy45gsm11⁠3/4⁠lb bond
30lb double large post 48015⁠3/4⁠lb large post17⁠3/4⁠lb demy63gsm16⁠3/4⁠lb bond
30lb double large post 50015lb large post17lb demy61gsm16⁠1/4⁠lb bond
30lb double large post 50415lb large post17lb demy60gsm16lb bond
36lb double large post 48018⁠3/4⁠lb large post21⁠1/4⁠lb demy76gsm20⁠1/4⁠lb bond
36lb double large post 50018lb large post20⁠1/2⁠lb demy73gsm19⁠1/2⁠lb bond
36lb double large post 50417⁠3/4⁠lb large post20⁠1/4⁠lb demy72gsm19⁠1/4⁠lb bond
42lb double large post 48022lb large post24⁠3/4⁠lb demy89gsm23⁠1/2⁠lb bond
42lb double large post 50021lb large post23⁠3/4⁠lb demy85gsm22⁠3/4⁠lb bond
42lb double large post 50420⁠3/4⁠lb large post23⁠3/4⁠lb demy85gsm22⁠1/2⁠lb bond
44lb double large post 50421⁠3/4⁠lb large post24⁠3/4⁠lb demy89gsm23⁠1/2⁠lb bond
13lb small medium 48012⁠1/4⁠lb large post13⁠3/4⁠lb demy49gsm13lb bond
18lb small medium 48017lb large post19⁠1/4⁠lb demy68gsm18⁠1/4⁠lb bond
21lb small medium 50418⁠3/4⁠lb large post21⁠1/4⁠lb demy76gsm20⁠1/4⁠lb bond
21⁠1/2⁠lb small medium 50019⁠1/4⁠lb large post22lb demy79gsm21lb bond
23lb small medium 48021⁠1/2⁠lb large post24⁠1/2⁠lb demy88gsm23⁠1/4⁠lb bond
23lb small medium 50420⁠1/2⁠lb large post23⁠1/4⁠lb demy83gsm22lb bond
24lb small medium 50421⁠1/2⁠lb large post24⁠1/4⁠lb demy87gsm23⁠1/4⁠lb bond
25lb small medium 48023⁠1/2⁠lb large post26⁠3/4⁠lb demy95gsm25⁠1/4⁠lb bond
25lb small medium 50422⁠1/4⁠lb large post25⁠1/4⁠lb demy91gsm24lb bond
30lb small medium 51626⁠1/4⁠lb large post29⁠3/4⁠lb demy106gsm28⁠1/4⁠lb bond
34lb small medium 48032lb large post36⁠1/4⁠lb demy129gsm34⁠1/2⁠lb bond
40lb small medium 50435⁠3/4⁠lb large post40⁠1/2⁠lb demy145gsm38⁠1/2⁠lb bond
13lb medium 50011lb large post12⁠1/4⁠lb demy44gsm11⁠3/4⁠lb bond
14lb medium 50012⁠1/2⁠lb large post13⁠1/4⁠lb demy51gsm13⁠1/2⁠lb bond
18lb medium 48015⁠3/4⁠lb large post17⁠3/4⁠lb demy64gsm17lb bond
18lb medium 50015lb large post17lb demy61gsm16⁠1/4⁠lb bond
21lb medium 50017⁠1/2⁠lb large post20lb demy71gsm19lb bond
21⁠1/2⁠lb medium 50018lb large post20⁠1/2⁠lb demy73gsm19⁠1/2⁠lb bond
25lb medium 50021lb large post23⁠3/4⁠lb demy85gsm22⁠1/2⁠lb bond
28lb medium 50023⁠1/2⁠lb large post26⁠3/4⁠lb demy95gsm25⁠1/4⁠lb bond
26lb double medium 50011lb large post12⁠1/4⁠lb demy44gsm11⁠3/4⁠lb bond
36lb double medium 50015lb large post17lb demy61gsm16⁠1/4⁠lb bond
46lb double medium 48020lb large post22⁠3/4⁠lb demy81gsm21⁠3/4⁠lb bond
46lb double medium 50419lb large post21⁠3/4⁠lb demy77gsm20⁠1/2⁠lb bond
48lb double medium 50420lb large post22⁠3/4⁠lb demy81gsm21⁠1/2⁠lb bond
50lb double medium 50420⁠3/4⁠lb large post23⁠1/2⁠lb demy84gsm22⁠1/2⁠lb bond
60lb double medium 48026⁠1/4⁠lb large post29⁠3/4⁠lb demy106gsm28⁠1/4⁠lb bond
60lb double medium 50025lb large post28⁠1/2⁠lb demy102gsm27lb bond
70lb double medium 50029⁠1/4⁠lb large post33⁠1/4⁠lb demy119gsm31⁠1/2⁠lb bond
20lb double small foolscap 50015⁠3/4⁠lb large post18lb demy64gsm17lb bond
24lb double small foolscap 48019⁠3/4⁠lb large post22⁠1/2⁠lb demy80gsm21⁠1/2⁠lb bond
24lb double small foolscap 50019lb large post21⁠1/2⁠lb demy77gsm20⁠1/2⁠lb bond
25lb double small foolscap 48020⁠3/4⁠lb large post23⁠1/2⁠lb demy84gsm22⁠1/4⁠lb bond
26lb double small foolscap 50420⁠1/2⁠lb large post23⁠1/4⁠lb demy83gsm22lb bond
28lb double small foolscap 48023lb large post26⁠1/4⁠lb demy94gsm25lb bond
28lb double small foolscap 50022⁠1/4⁠lb large post25⁠1/2⁠lb demy90gsm24lb bond
28lb double small foolscap 50422lb large post25lb demy89gsm23⁠3/4⁠lb bond
30lb double small foolscap 48024⁠3/4⁠lb large post28⁠1/4⁠lb demy100gsm26⁠3/4⁠lb bond
30lb double small foolscap 50423⁠1/2⁠lb large post26⁠3/4⁠lb demy96gsm25⁠1/2⁠lb bond
32lb double small foolscap 50425⁠1/4⁠lb large post28⁠1/2⁠lb demy102gsm27⁠1/4⁠lb bond
34lb double small foolscap 50426⁠3/4⁠lb large post30⁠1/4⁠lb demy108gsm28⁠3/4⁠lb bond
36lb double small foolscap 48029⁠3/4⁠lb large post33⁠3/4⁠lb demy121gsm32lb bond
14⁠1/2⁠lb double foolscap 48011⁠1/2⁠lb large post13lb demy46gsm12⁠1/4⁠lb bond
14⁠1/2⁠lb double foolscap 50011lb large post12⁠1/2⁠lb demy44gsm11⁠3/4⁠lb bond
20lb double foolscap 48015⁠3/4⁠lb large post17⁠3/4⁠lb demy64gsm17lb bond
20lb double foolscap 50015lb large post17⁠1/4⁠lb demy61gsm16⁠1/4⁠lb bond
24lb double foolscap 48019lb large post21⁠1/2⁠lb demy77gsm20⁠1/4⁠lb bond
24lb double foolscap 50018lb large post20⁠1/2⁠lb demy74gsm19⁠1/2⁠lb bond
28lb double foolscap 50021⁠1/4⁠lb large post24lb demy86gsm22⁠3/4⁠lb bond
30lb double crown 50017⁠1/4⁠lb large post19⁠3/4⁠lb demy70gsm18⁠3/4⁠lb bond
32lb double crown 48019⁠1/4⁠lb large post22lb demy78gsm20⁠3/4⁠lb bond
32lb double crown 50418⁠1/4⁠lb large post20⁠3/4⁠lb demy74gsm19⁠3/4⁠lb bond
36lb double crown 50020⁠3/4⁠lb large post23⁠3/4⁠lb demy84gsm22⁠1/2⁠lb bond
40lb double crown 50023lb large post26⁠1/4⁠lb demy94gsm25lb bond
40lb double crown 50423lb large post26lb demy93gsm24⁠3/4⁠lb bond
44lb double crown 50025⁠1/2⁠lb large post29lb demy103gsm27⁠1/2⁠lb bond
46lb double crown 48027⁠3/4⁠lb large post31⁠1/2⁠lb demy112gsm29⁠3/4⁠lb bond
50lb double crown 50028⁠3/4⁠lb large post32⁠3/4⁠lb demy117gsm31⁠1/4⁠lb bond
60lb double crown 50434⁠1/2⁠lb large post39lb demy139gsm37lb bond
88lb quad crown 50025⁠1/2⁠lb large post29lb demy103gsm27⁠1/2⁠lb bond
100lb quad crown 50028⁠3/4⁠lb large post32⁠3/4⁠lb demy117gsm31⁠1/4⁠lb bond
25lb small demy 48029lb large post33lb demy118gsm31⁠1/2⁠lb bond
38lb small demy 48044⁠1/4⁠lb large post50⁠1/4⁠lb demy180gsm47⁠3/4⁠lb bond
18lb small foolscap 48029⁠3/4⁠lb large post33⁠3/4⁠lb demy121gsm32lb bond
48lb quad foolscap 50418lb large post20⁠1/2⁠lb demy73gsm19⁠1/2⁠lb bond
50lb quad foolscap 48019⁠3/4⁠lb large post22⁠1/4⁠lb demy80gsm21⁠1/4⁠lb bond
72lb imperial (writing and printing) 48039⁠1/2⁠lb large post44⁠3/4⁠lb demy160gsm42⁠1/2⁠lb bond
18lb post (writing) (pre–‍1937 standardisation) 48022⁠1/2⁠lb large post25⁠1/2⁠lb demy91gsm24⁠1/4⁠lb bond
20lb post (writing) (pre–‍1937 standardisation) 48025lb large post28⁠1/4⁠lb demy101gsm27lb bond
22lb post (writing) (pre–‍1937 standardisation) 48027⁠1/2⁠lb large post31⁠1/4⁠lb demy111gsm29⁠1/2⁠lb bond
72lb quad large post 50417⁠3/4⁠lb large post20⁠1/4⁠lb demy72gsm19⁠1/4⁠lb bond
84lb quad large post 48022lb large post24⁠3/4⁠lb demy89gsm23⁠1/2⁠lb bond
29lb pinched post 48038⁠1/4⁠lb large post43⁠1/2⁠lb demy156gsm41⁠1/2⁠lb bond
44lb small royal 48034⁠3/4⁠lb large post39⁠1/2⁠lb demy141gsm37⁠1/2⁠lb bond
54lb super royal (writing) (pre–‍1925 standardisation) 48037⁠1/2⁠lb large post42⁠1/2⁠lb demy152gsm40⁠1/2⁠lb bond
Printing paper
Common British basis weights

(various paper sizes and ream sizes)

Equivalent weight of a 500‑sheet ream of double crown paper, a British uncut printing paper commonly used to express the basis weight of printing paper

(rounded to the nearest quarter)

(a common British basis for intra‑category comparison)

Equivalent weight of a 500‑sheet ream of demy paper, a British uncut printing paper commonly used by default to express the basis weight of different types of paper [a]

(rounded to the nearest quarter)

(a common British basis for cross‑category comparison)

Equivalent grammage

(rounded to the nearest one)

Equivalent weight of a 500‑sheet ream of bond paper, an American uncut paper commonly used to express the basis weight of paper

(rounded to the nearest quarter)

(a common American basis for cross‑category comparison)

17lb double crown 48017⁠3/4⁠lb double crown11⁠1/2⁠lb demy42gsm11lb bond
19lb double crown 48019⁠3/4⁠lb double crown13lb demy46gsm12⁠1/4⁠lb bond
20lb double crown 48020⁠3/4⁠lb double crown13⁠3/4⁠lb demy49gsm13lb bond
20lb double crown 51619⁠1/2⁠lb double crown12⁠3/4⁠lb demy45gsm12lb bond
21lb double crown 48022lb double crown14⁠1/4⁠lb demy51gsm13⁠3/4⁠lb bond
22lb double crown 48023lb double crown15lb demy54gsm14⁠1/4⁠lb bond
23lb double crown 48024lb double crown15⁠3/4⁠lb demy56gsm15lb bond
23lb double crown 50422⁠3/4⁠lb double crown15lb demy53gsm14⁠1/4⁠lb bond
24lb double crown 50423⁠3/4⁠lb double crown15⁠3/4⁠lb demy56gsm14⁠3/4⁠lb bond
24lb double crown 51623⁠1/4⁠lb double crown15⁠1/4⁠lb demy55gsm14⁠1/2⁠lb bond
25lb double crown 48026lb double crown17lb demy61gsm16⁠1/4⁠lb bond
25lb double crown 50424⁠3/4⁠lb double crown16⁠1/4⁠lb demy58gsm15⁠1/2⁠lb bond
26lb double crown 48027lb double crown17⁠3/4⁠lb demy63gsm16⁠3/4⁠lb bond
26lb double crown 50425⁠3/4⁠lb double crown17lb demy60gsm16lb bond
26lb double crown 51625⁠1/4⁠lb double crown16⁠1/2⁠lb demy59gsm15⁠3/4⁠lb bond
27lb double crown 48028⁠1/2⁠lb double crown18⁠1/2⁠lb demy66gsm17⁠1/2⁠lb bond
27lb double crown 50027lb double crown17⁠3/4⁠lb demy63gsm16⁠3/4⁠lb bond
27lb double crown 50426⁠3/4⁠lb double crown17⁠1/2⁠lb demy63gsm16⁠3/4⁠lb bond
28lb double crown 48029⁠1/4⁠lb double crown19⁠1/4⁠lb demy68gsm18⁠1/4⁠lb bond
28lb double crown 51627⁠1/4⁠lb double crown17⁠3/4⁠lb demy64gsm17lb bond
29lb double crown 48030⁠1/4⁠lb double crown19⁠3/4⁠lb demy71gsm18⁠3/4⁠lb bond
30lb double crown 48031⁠1/4⁠lb double crown20⁠1/2⁠lb demy73gsm19⁠1/2⁠lb bond
30lb double crown 50030lb double crown19⁠3/4⁠lb demy70gsm18⁠3/4⁠lb bond
30lb double crown 50429⁠3/4⁠lb double crown19⁠1/2⁠lb demy70gsm18⁠1/2⁠lb bond
30lb double crown 51629lb double crown19lb demy68gsm18lb bond
31lb double crown 50430⁠3/4⁠lb double crown20⁠1/4⁠lb demy72gsm19⁠1/4⁠lb bond
32lb double crown 48033⁠1/4⁠lb double crown22lb demy78gsm20⁠3/4⁠lb bond
32lb double crown 50431⁠3/4⁠lb double crown20⁠3/4⁠lb demy74gsm19⁠3/4⁠lb bond
32lb double crown 51631lb double crown20⁠1/4⁠lb demy73gsm19⁠1/4⁠lb bond
33lb double crown 48035lb double crown22⁠1/2⁠lb demy81gsm21⁠1/2⁠lb bond
33lb double crown 50432⁠3/4⁠lb double crown21⁠1/2⁠lb demy77gsm20⁠1/2⁠lb bond
34lb double crown 50433⁠3/4⁠lb double crown22⁠1/4⁠lb demy79gsm21lb bond
34lb double crown 51633lb double crown21⁠1/2⁠lb demy77gsm20⁠1/2⁠lb bond
35lb double crown 48036⁠1/2⁠lb double crown24lb demy85gsm22⁠3/4⁠lb bond
36lb double crown 48037⁠1/2⁠lb double crown24⁠1/2⁠lb demy88gsm23⁠1/2⁠lb bond
36lb double crown 50036lb double crown23⁠3/4⁠lb demy84gsm22⁠1/2⁠lb bond
36lb double crown 50435⁠3/4⁠lb double crown23⁠1/2⁠lb demy84gsm22⁠1/4⁠lb bond
36lb double crown 51635lb double crown23lb demy82gsm21⁠3/4⁠lb bond
38lb double crown 48039⁠1/2⁠lb double crown26lb demy93gsm24⁠3/4⁠lb bond
38lb double crown 50437⁠3/4⁠lb double crown24⁠3/4⁠lb demy88gsm23⁠1/2⁠lb bond
38lb double crown 51636⁠3/4⁠lb double crown24⁠1/4⁠lb demy86gsm23lb bond
39lb double crown 50438⁠3/4⁠lb double crown25⁠1/2⁠lb demy91gsm24lb bond
40lb double crown 48041⁠3/4⁠lb double crown27⁠1/4⁠lb demy98gsm26lb bond
40lb double crown 50040lb double crown26⁠1/4⁠lb demy94gsm25lb bond
40lb double crown 50439⁠3/4⁠lb double crown26lb demy93gsm24⁠3/4⁠lb bond
40lb double crown 51638⁠3/4⁠lb double crown25⁠1/2⁠lb demy91gsm24⁠1/4⁠lb bond
42lb double crown 48043⁠3/4⁠lb double crown28⁠3/4⁠lb demy103gsm27⁠1/4⁠lb bond
42lb double crown 50441⁠3/4⁠lb double crown27⁠1/4⁠lb demy98gsm26lb bond
44lb double crown 48045⁠3/4⁠lb double crown30lb demy107gsm28⁠1/2⁠lb bond
44lb double crown 50044lb double crown28⁠3/4⁠lb demy103gsm27⁠1/2⁠lb bond
44lb double crown 51642⁠3/4⁠lb double crown28lb demy100gsm26⁠1/2⁠lb bond
45lb double crown 48047lb double crown30⁠3/4⁠lb demy110gsm29⁠1/4⁠lb bond
45lb double crown 50045lb double crown29⁠1/2⁠lb demy105gsm28lb bond
46lb double crown 48048lb double crown31⁠1/2⁠lb demy112gsm29⁠3/4⁠lb bond
46lb double crown 50445⁠3/4⁠lb double crown30lb demy107gsm28⁠1/2⁠lb bond
46lb double crown 51644⁠1/2⁠lb double crown29⁠1/4⁠lb demy104gsm27⁠3/4⁠lb bond
47lb double crown 48049lb double crown32lb demy115gsm30⁠1/2⁠lb bond
50lb double crown 48052lb double crown34⁠1/4⁠lb demy122gsm32⁠1/2⁠lb bond
50lb double crown 50050lb double crown32⁠3/4⁠lb demy117gsm31⁠1/4⁠lb bond
50lb double crown 50449⁠1/2⁠lb double crown32⁠1/2⁠lb demy116gsm31lb bond
50lb double crown 51648⁠1/2⁠lb double crown31⁠3/4⁠lb demy114gsm30⁠1/4⁠lb bond
52lb double crown 48054⁠1/4⁠lb double crown35⁠1/2⁠lb demy127gsm33⁠3/4⁠lb bond
54lb double crown 48056⁠1/4⁠lb double crown37lb demy132gsm35lb bond
54lb double crown 51652⁠1/4⁠lb double crown34⁠1/4⁠lb demy123gsm32⁠1/2⁠lb bond
55lb double crown 48057⁠1/4⁠lb double crown37⁠1/2⁠lb demy134gsm35⁠3/4⁠lb bond
56lb double crown 51654⁠1/4⁠lb double crown35⁠1/2⁠lb demy127gsm33⁠3/4⁠lb bond
57lb double crown 48059⁠1/2⁠lb double crown39lb demy139gsm37lb bond
58lb double crown 50058lb double crown38lb demy136gsm36⁠1/4⁠lb bond
60lb double crown 48062⁠1/2⁠lb double crown41lb demy146gsm39lb bond
60lb double crown 50060lb double crown39⁠1/2⁠lb demy141gsm37⁠1/2⁠lb bond
60lb double crown 50459⁠1/2⁠lb double crown39lb demy139gsm37lb bond
60lb double crown 51658⁠1/4⁠lb double crown38⁠1/4⁠lb demy136gsm36⁠1/4⁠lb bond
61lb double crown 48063⁠1/2⁠lb double crown41⁠3/4⁠lb demy149gsm39⁠1/2⁠lb bond
76lb double crown 48079⁠1/4⁠lb double crown52lb demy186gsm49⁠1/4⁠lb bond
79lb double crown 51676⁠1/2⁠lb double crown50⁠1/4⁠lb demy179gsm47⁠3/4⁠lb bond
80lb double crown 48083⁠1/4⁠lb double crown54⁠3/4⁠lb demy195gsm52lb bond
80lb double crown 50479⁠1/4⁠lb double crown52lb demy186gsm49⁠1/2⁠lb bond
40lb quad crown 51619⁠1/2⁠lb double crown12⁠3/4⁠lb demy45gsm12lb bond
48lb quad crown 50423⁠3/4⁠lb double crown15⁠3/4⁠lb demy56gsm14⁠3/4⁠lb bond
50lb quad crown 48026lb double crown17lb demy61gsm16⁠1/4⁠lb bond
54lb quad crown 50027lb double crown17⁠3/4⁠lb demy63gsm16⁠3/4⁠lb bond
60lb quad crown 48031⁠1/4⁠lb double crown20⁠1/2⁠lb demy73gsm19⁠1/2⁠lb bond
60lb quad crown 50030lb double crown19⁠3/4⁠lb demy70gsm18⁠3/4⁠lb bond
60lb quad crown 50429⁠3/4⁠lb double crown19⁠1/2⁠lb demy70gsm18⁠1/2⁠lb bond
60lb quad crown 51629lb double crown19lb demy68gsm18lb bond
64lb quad crown 51631lb double crown20⁠1/4⁠lb demy73gsm19⁠1/4⁠lb bond
68lb quad crown 51633lb double crown21⁠1/2⁠lb demy77gsm20⁠1/2⁠lb bond
70lb quad crown 48036⁠1/2⁠lb double crown24lb demy85gsm22⁠3/4⁠lb bond
70lb quad crown 51634lb double crown22⁠1/4⁠lb demy79gsm21⁠1/4⁠lb bond
72lb quad crown 50036lb double crown23⁠3/4⁠lb demy84gsm22⁠1/2⁠lb bond
72lb quad crown 50435⁠3/4⁠lb double crown23⁠1/2⁠lb demy84gsm22⁠1/4⁠lb bond
80lb quad crown 50040lb double crown26⁠1/4⁠lb demy94gsm25lb bond
80lb quad crown 50439⁠3/4⁠lb double crown26lb demy93gsm24⁠3/4⁠lb bond
80lb quad crown 51638⁠3/4⁠lb double crown25⁠1/2⁠lb demy91gsm24⁠1/4⁠lb bond
86lb quad crown 48044⁠3/4⁠lb double crown29⁠1/2⁠lb demy105gsm28lb bond
88lb quad crown 50044lb double crown29lb demy103gsm27⁠1/2⁠lb bond
96lb quad crown 51646⁠1/2⁠lb double crown30⁠1/2⁠lb demy109gsm29lb bond
100lb quad crown 50050lb double crown32⁠3/4⁠lb demy117gsm31⁠1/4⁠lb bond
100lb quad crown 50449⁠1/2⁠lb double crown32⁠1/2⁠lb demy116gsm31lb bond
100lb quad crown 51648⁠1/2⁠lb double crown31⁠3/4⁠lb demy114gsm30⁠1/4⁠lb bond
120lb quad crown 50060lb double crown39⁠1/2⁠lb demy141gsm37⁠1/2⁠lb bond
120lb quad crown 50459⁠1/2⁠lb double crown39lb demy139gsm37lb bond
120lb quad crown 51658⁠1/4⁠lb double crown38⁠1/4⁠lb demy136gsm36⁠1/4⁠lb bond
14lb demy 48022⁠1/4⁠lb double crown14⁠1/2⁠lb demy52gsm13⁠3/4⁠lb bond
16lb demy 48025⁠1/2⁠lb double crown16⁠3/4⁠lb demy60gsm15⁠3/4⁠lb bond
17lb demy 48027lb double crown17⁠3/4⁠lb demy63gsm16⁠3/4⁠lb bond
18lb demy 48028⁠1/2⁠lb double crown18⁠3/4⁠lb demy67gsm17⁠3/4⁠lb bond
18lb demy 50427⁠1/4⁠lb double crown17⁠3/4⁠lb demy64gsm17lb bond
19lb demy 48030⁠1/4⁠lb double crown19⁠3/4⁠lb demy71gsm18⁠3/4⁠lb bond
20lb demy 48031⁠3/4⁠lb double crown20⁠3/4⁠lb demy74gsm19⁠3/4⁠lb bond
20lb demy 50430⁠1/4⁠lb double crown19⁠3/4⁠lb demy71gsm18⁠3/4⁠lb bond
20lb demy 51629⁠1/2⁠lb double crown19⁠1/2⁠lb demy69gsm18⁠1/2⁠lb bond
21lb demy 48033⁠1/4⁠lb double crown22lb demy78gsm20⁠3/4⁠lb bond
24lb demy 50436⁠1/4⁠lb double crown23⁠3/4⁠lb demy85gsm22⁠1/2⁠lb bond
25lb demy 48039⁠3/4⁠lb double crown26lb demy93gsm24⁠3/4⁠lb bond
26lb demy 48041⁠1/4⁠lb double crown27lb demy97gsm25⁠3/4⁠lb bond
28lb demy 48044⁠1/2⁠lb double crown29⁠1/4⁠lb demy104gsm27⁠3/4⁠lb bond
29lb demy 48046lb double crown30⁠1/4⁠lb demy108gsm28⁠3/4⁠lb bond
30lb demy 48047⁠1/2⁠lb double crown31⁠1/4⁠lb demy112gsm29⁠3/4⁠lb bond
30lb demy 51644⁠1/4⁠lb double crown29lb demy104gsm27⁠1/2⁠lb bond
32lb demy 48050⁠3/4⁠lb double crown33⁠1/4⁠lb demy119gsm31⁠3/4⁠lb bond
34lb demy 48054lb double crown35⁠1/2⁠lb demy126gsm33⁠3/4⁠lb bond
35lb demy 48055⁠1/2⁠lb double crown36⁠1/2⁠lb demy130gsm34⁠1/2⁠lb bond
36lb demy 48057⁠1/4⁠lb double crown37⁠1/2⁠lb demy134gsm35⁠1/2⁠lb bond
44lb demy 48069⁠3/4⁠lb double crown45⁠3/4⁠lb demy164gsm43⁠1/2⁠lb bond
64lb demy 51694⁠1/2⁠lb double crown62lb demy221gsm59lb bond
23lb double demy 48018⁠1/4⁠lb double crown12lb demy43gsm11⁠1/2⁠lb bond
25lb double demy 48019⁠3/4⁠lb double crown13lb demy46gsm12⁠1/4⁠lb bond
26lb double demy 48020⁠3/4⁠lb double crown13⁠1/2⁠lb demy48gsm12⁠3/4⁠lb bond
28lb double demy 48022⁠1/4⁠lb double crown14⁠1/2⁠lb demy52gsm13⁠3/4⁠lb bond
28lb double demy 51620⁠3/4⁠lb double crown13⁠1/2⁠lb demy48gsm13lb bond
30lb double demy 48023⁠3/4⁠lb double crown15⁠3/4⁠lb demy56gsm14⁠3/4⁠lb bond
30lb double demy 51622⁠1/4⁠lb double crown14⁠1/2⁠lb demy52gsm13⁠3/4⁠lb bond
32lb double demy 48025⁠1/2⁠lb double crown16⁠3/4⁠lb demy60gsm15⁠3/4⁠lb bond
32lb double demy 50424⁠1/4⁠lb double crown15⁠3/4⁠lb demy57gsm15lb bond
32lb double demy 51623⁠1/2⁠lb double crown15⁠1/2⁠lb demy55gsm14⁠3/4⁠lb bond
33lb double demy 48026⁠1/4⁠lb double crown17⁠1/4⁠lb demy61gsm16⁠1/4⁠lb bond
34lb double demy 48027lb double crown17⁠3/4⁠lb demy63gsm16⁠3/4⁠lb bond
34lb double demy 50425⁠3/4⁠lb double crown16⁠3/4⁠lb demy60gsm16lb bond
34lb double demy 51625lb double crown16⁠1/2⁠lb demy59gsm15⁠3/4⁠lb bond
35lb double demy 48027⁠3/4⁠lb double crown18⁠1/4⁠lb demy65gsm17⁠1/4⁠lb bond
36lb double demy 48028⁠1/2⁠lb double crown18⁠3/4⁠lb demy67gsm17⁠3/4⁠lb bond
36lb double demy 50027⁠1/2⁠lb double crown18lb demy64gsm17lb bond
36lb double demy 50427⁠1/4⁠lb double crown17⁠3/4⁠lb demy64gsm17lb bond
36lb double demy 51626⁠1/2⁠lb double crown17⁠1/2⁠lb demy62gsm16⁠1/2⁠lb bond
38lb double demy 48030⁠1/4⁠lb double crown19⁠3/4⁠lb demy71gsm18⁠3/4⁠lb bond
38lb double demy 50428⁠3/4⁠lb double crown18⁠3/4⁠lb demy67gsm18lb bond
40lb double demy 48031⁠3/4⁠lb double crown20⁠3/4⁠lb demy74gsm19⁠3/4⁠lb bond
40lb double demy 50030⁠1/2⁠lb double crown20lb demy71gsm19lb bond
40lb double demy 50430⁠1/4⁠lb double crown19⁠3/4⁠lb demy71gsm18⁠3/4⁠lb bond
40lb double demy 51629⁠1/2⁠lb double crown19⁠1/2⁠lb demy69gsm18⁠1/2⁠lb bond
42lb double demy 48033⁠1/4⁠lb double crown22lb demy78gsm20⁠3/4⁠lb bond
42lb double demy 51631lb double crown20⁠1/4⁠lb demy73gsm19⁠1/4⁠lb bond
44lb double demy 51632⁠1/2⁠lb double crown21⁠1/4⁠lb demy76gsm20⁠1/4⁠lb bond
45lb double demy 50034⁠1/4⁠lb double crown22⁠1/2⁠lb demy80gsm21⁠1/4⁠lb bond
45lb double demy 51633⁠1/4⁠lb double crown21⁠3/4⁠lb demy78gsm20⁠3/4⁠lb bond
46lb double demy 48036⁠1/2⁠lb double crown24lb demy86gsm22⁠3/4⁠lb bond
46lb double demy 51634lb double crown22⁠1/4⁠lb demy80gsm21⁠1/4⁠lb bond
47lb double demy 51634⁠3/4⁠lb double crown22⁠3/4⁠lb demy81gsm21⁠1/2⁠lb bond
48lb double demy 48038lb double crown25lb demy89gsm23⁠3/4⁠lb bond
48lb double demy 50036⁠1/2⁠lb double crown24lb demy86gsm22⁠3/4⁠lb bond
48lb double demy 50436⁠1/4⁠lb double crown23⁠3/4⁠lb demy85gsm22⁠1/2⁠lb bond
48lb double demy 51635⁠1/2⁠lb double crown23⁠1/4⁠lb demy83gsm22lb bond
50lb double demy 48039⁠3/4⁠lb double crown26lb demy93gsm24⁠3/4⁠lb bond
52lb double demy 50439⁠1/4⁠lb double crown25⁠3/4⁠lb demy92gsm24⁠1/2⁠lb bond
53lb double demy 51639⁠1/4⁠lb double crown25⁠3/4⁠lb demy92gsm24⁠1/2⁠lb bond
54lb double demy 48042⁠3/4⁠lb double crown28⁠1/4⁠lb demy100gsm26⁠3/4⁠lb bond
55lb double demy 48043⁠3/4⁠lb double crown28⁠3/4⁠lb demy102gsm27⁠1/4⁠lb bond
55lb double demy 51640⁠1/2⁠lb double crown26⁠3/4⁠lb demy95gsm25⁠1/4⁠lb bond
56lb double demy 48044⁠1/2⁠lb double crown29⁠1/4⁠lb demy104gsm27⁠3/4⁠lb bond
56lb double demy 51641⁠1/4⁠lb double crown27⁠1/4⁠lb demy97gsm25⁠3/4⁠lb bond
60lb double demy 48047⁠1/2⁠lb double crown31⁠1/4⁠lb demy112gsm29⁠3/4⁠lb bond
60lb double demy 50445⁠1/4⁠lb double crown29⁠3/4⁠lb demy106gsm28⁠1/4⁠lb bond
60lb double demy 51644⁠1/4⁠lb double crown29lb demy104gsm27⁠1/2⁠lb bond
64lb double demy 51647⁠1/4⁠lb double crown31lb demy111gsm29⁠1/2⁠lb bond
68lb double demy 48054lb double crown35⁠1/2⁠lb demy126gsm33⁠3/4⁠lb bond
69lb double demy 48054⁠3/4⁠lb double crown36lb demy128gsm34⁠1/4⁠lb bond
70lb double demy 48055⁠1/2⁠lb double crown36⁠1/2⁠lb demy130gsm34⁠1/2⁠lb bond
72lb double demy 51653⁠1/4⁠lb double crown35lb demy125gsm33⁠1/4⁠lb bond
74lb double demy 48058⁠3/4⁠lb double crown38⁠1/2⁠lb demy138gsm36⁠1/2⁠lb bond
80lb double demy 50460⁠1/2⁠lb double crown39⁠3/4⁠lb demy142gsm37⁠3/4⁠lb bond
88lb double demy 51665lb double crown42⁠3/4⁠lb demy152gsm40⁠1/2⁠lb bond
89lb double demy 48070⁠3/4⁠lb double crown46⁠1/4⁠lb demy166gsm44lb bond
19lb medium 48028⁠3/4⁠lb double crown18⁠3/4⁠lb demy67gsm18lb bond
20lb medium 48030⁠1/4⁠lb double crown19⁠3/4⁠lb demy71gsm18⁠3/4⁠lb bond
24lb medium 48036⁠1/4⁠lb double crown23⁠3/4⁠lb demy85gsm22⁠1/2⁠lb bond
25lb medium 48037⁠3/4⁠lb double crown24⁠3/4⁠lb demy88gsm23⁠1/2⁠lb bond
25lb medium 50436lb double crown23⁠1/2⁠lb demy84gsm22⁠1/2⁠lb bond
27lb medium 48040⁠3/4⁠lb double crown26⁠3/4⁠lb demy96gsm25⁠1/2⁠lb bond
28lb medium 48042⁠1/4⁠lb double crown27⁠3/4⁠lb demy99gsm26⁠1/4⁠lb bond
29lb medium 48043⁠3/4⁠lb double crown28⁠3/4⁠lb demy103gsm27⁠1/4⁠lb bond
30lb medium 48045⁠1/4⁠lb double crown29⁠3/4⁠lb demy106gsm28⁠1/4⁠lb bond
30lb medium 51642⁠1/4⁠lb double crown27⁠3/4⁠lb demy99gsm26⁠1/4⁠lb bond
31lb medium 48046⁠3/4⁠lb double crown30⁠3/4⁠lb demy110gsm29⁠1/4⁠lb bond
32lb medium 48048⁠1/4⁠lb double crown31⁠3/4⁠lb demy113gsm30lb bond
33lb medium 51646⁠1/4⁠lb double crown30⁠1/2⁠lb demy109gsm29lb bond
34lb medium 48051⁠1/4⁠lb double crown33⁠3/4⁠lb demy120gsm32lb bond
34lb medium 50449lb double crown32lb demy115gsm30⁠1/2⁠lb bond
35lb medium 48052⁠3/4⁠lb double crown34⁠3/4⁠lb demy124gsm33lb bond
38lb medium 51653⁠1/4⁠lb double crown35lb demy125gsm33⁠1/4⁠lb bond
40lb medium 48060⁠1/2⁠lb double crown39⁠3/4⁠lb demy142gsm37⁠3/4⁠lb bond
40lb medium 50457⁠1/2⁠lb double crown37⁠3/4⁠lb demy135gsm35⁠3/4⁠lb bond
40lb medium 51656⁠1/4⁠lb double crown36⁠3/4⁠lb demy132gsm35lb bond
45lb medium 48068lb double crown44⁠1/2⁠lb demy159gsm42⁠1/4⁠lb bond
48lb medium 48072⁠1/2⁠lb double crown47⁠1/2⁠lb demy170gsm45⁠1/4⁠lb bond
50lb medium 50472lb double crown47⁠1/4⁠lb demy168gsm44⁠3/4⁠lb bond
53lb medium 50476⁠1/4⁠lb double crown50lb demy179gsm47⁠1/2⁠lb bond
55lb medium 48083lb double crown54⁠1/2⁠lb demy195gsm51⁠3/4⁠lb bond
42lb double medium 48031⁠3/4⁠lb double crown20⁠3/4⁠lb demy74gsm19⁠3/4⁠lb bond
50lb double medium 48037⁠3/4⁠lb double crown24⁠3/4⁠lb demy88gsm23⁠1/2⁠lb bond
50lb double medium 50436lb double crown23⁠1/2⁠lb demy84gsm22⁠1/2⁠lb bond
50lb double medium 51635lb double crown23lb demy82gsm22lb bond
55lb double medium 50039⁠3/4⁠lb double crown26⁠1/4⁠lb demy93gsm24⁠3/4⁠lb bond
60lb double medium 50043⁠1/2⁠lb double crown28⁠1/2⁠lb demy102gsm27lb bond
60lb double medium 51642⁠1/4⁠lb double crown27⁠3/4⁠lb demy99gsm26⁠1/4⁠lb bond
62lb double medium 50045lb double crown29⁠1/2⁠lb demy105gsm28lb bond
64lb double medium 51645lb double crown29⁠1/2⁠lb demy105gsm28lb bond
65lb double medium 50047lb double crown31lb demy110gsm29⁠1/4⁠lb bond
68lb double medium 48051⁠1/4⁠lb double crown33⁠3/4⁠lb demy120gsm32lb bond
68lb double medium 50449lb double crown32lb demy115gsm30⁠1/2⁠lb bond
69lb double medium 50050lb double crown32⁠3/4⁠lb demy117gsm31⁠1/4⁠lb bond
70lb double medium 50050⁠3/4⁠lb double crown33⁠1/4⁠lb demy119gsm31⁠1/2⁠lb bond
80lb double medium 50058lb double crown38lb demy136gsm36⁠1/4⁠lb bond
80lb double medium 51656⁠1/4⁠lb double crown36⁠3/4⁠lb demy132gsm35lb bond
20lb royal 48025lb double crown16⁠1/2⁠lb demy59gsm15⁠1/2⁠lb bond
21lb royal 51624⁠1/2⁠lb double crown16lb demy57gsm15⁠1/4⁠lb bond
22lb royal 48027⁠1/2⁠lb double crown18lb demy64gsm17⁠1/4⁠lb bond
23lb royal 48028⁠3/4⁠lb double crown18⁠3/4⁠lb demy67gsm18lb bond
24lb royal 48030lb double crown19⁠3/4⁠lb demy70gsm18⁠3/4⁠lb bond
24lb royal 50428⁠1/2⁠lb double crown18⁠3/4⁠lb demy67gsm17⁠3/4⁠lb bond
24lb royal 51628lb double crown18⁠1/4⁠lb demy65gsm17⁠1/2⁠lb bond
25lb royal 51629lb double crown19lb demy68gsm18lb bond
26lb royal 48032⁠1/2⁠lb double crown21⁠1/4⁠lb demy76gsm20⁠1/4⁠lb bond
26lb royal 51630⁠1/4⁠lb double crown19⁠3/4⁠lb demy71gsm18⁠3/4⁠lb bond
27lb royal 51631⁠1/2⁠lb double crown20⁠1/2⁠lb demy74gsm19⁠1/2⁠lb bond
30lb royal 48037⁠1/2⁠lb double crown24⁠1/2⁠lb demy88gsm23⁠1/4⁠lb bond
30lb royal 51635lb double crown23lb demy82gsm21⁠3/4⁠lb bond
31lb royal 48038⁠3/4⁠lb double crown25⁠1/2⁠lb demy91gsm24⁠1/4⁠lb bond
32lb royal 48040lb double crown26⁠1/4⁠lb demy94gsm25lb bond
33lb royal 48041⁠1/4⁠lb double crown27lb demy97gsm25⁠3/4⁠lb bond
34lb royal 48042⁠1/2⁠lb double crown28lb demy100gsm26⁠1/2⁠lb bond
36lb royal 48045lb double crown29⁠1/2⁠lb demy105gsm28lb bond
36lb royal 51641⁠3/4⁠lb double crown27⁠1/2⁠lb demy98gsm26lb bond
37lb royal 48046⁠1/4⁠lb double crown30⁠1/4⁠lb demy108gsm28⁠3/4⁠lb bond
38lb royal 48047⁠1/2⁠lb double crown31⁠1/4⁠lb demy111gsm29⁠1/2⁠lb bond
39lb royal 48048⁠3/4⁠lb double crown32lb demy114gsm30⁠1/2⁠lb bond
40lb royal 48050lb double crown32⁠3/4⁠lb demy117gsm31⁠1/4⁠lb bond
40lb royal 50447⁠1/2⁠lb double crown31⁠1/4⁠lb demy112gsm29⁠3/4⁠lb bond
40lb royal 51646⁠1/2⁠lb double crown30⁠1/2⁠lb demy109gsm29lb bond
41lb royal 48051⁠1/4⁠lb double crown33⁠3/4⁠lb demy120gsm32lb bond
42lb royal 48052⁠1/2⁠lb double crown34⁠1/2⁠lb demy123gsm32⁠3/4⁠lb bond
44lb royal 48055lb double crown36lb demy129gsm34⁠1/4⁠lb bond
45lb royal 48056⁠1/4⁠lb double crown37lb demy132gsm35lb bond
47lb royal 48058⁠3/4⁠lb double crown38⁠1/2⁠lb demy138gsm36⁠1/2⁠lb bond
50lb royal 48062⁠1/2⁠lb double crown41lb demy146gsm39lb bond
50lb royal 50459⁠1/2⁠lb double crown39lb demy139gsm37lb bond
50lb royal 51658⁠1/4⁠lb double crown38⁠1/4⁠lb demy136gsm36⁠1/4⁠lb bond
51lb royal 48063⁠3/4⁠lb double crown41⁠3/4⁠lb demy149gsm39⁠3/4⁠lb bond
60lb royal 48075lb double crown49⁠1/4⁠lb demy176gsm46⁠3/4⁠lb bond
61lb royal 48076⁠1/4⁠lb double crown50lb demy179gsm47⁠1/2⁠lb bond
66lb royal 48082⁠1/2⁠lb double crown54⁠1/4⁠lb demy193gsm51⁠1/2⁠lb bond
67lb royal 50479⁠3/4⁠lb double crown52⁠1/4⁠lb demy187gsm49⁠3/4⁠lb bond
70lb royal 48087⁠1/2⁠lb double crown57⁠1/2⁠lb demy205gsm54⁠1/2⁠lb bond
32lb double royal 50019⁠1/4⁠lb double crown12⁠1/2⁠lb demy45gsm12lb bond
37lb double royal 48023⁠1/4⁠lb double crown15⁠1/4⁠lb demy54gsm14⁠1/2⁠lb bond
40lb double royal 50423⁠3/4⁠lb double crown15⁠3/4⁠lb demy56gsm14⁠3/4⁠lb bond
42lb double royal 51624⁠1/2⁠lb double crown16lb demy57gsm15⁠1/4⁠lb bond
46lb double royal 48028⁠3/4⁠lb double crown18⁠3/4⁠lb demy67gsm18lb bond
48lb double royal 50428⁠1/2⁠lb double crown18⁠3/4⁠lb demy67gsm17⁠3/4⁠lb bond
48lb double royal 51628lb double crown18⁠1/4⁠lb demy65gsm17⁠1/2⁠lb bond
50lb double royal 50030lb double crown19⁠3/4⁠lb demy70gsm18⁠3/4⁠lb bond
50lb double royal 51629lb double crown19lb demy68gsm18lb bond
54lb double royal 51631⁠1/2⁠lb double crown20⁠1/2⁠lb demy74gsm19⁠1/2⁠lb bond
60lb double royal 50036lb double crown23⁠3/4⁠lb demy84gsm22⁠1/2⁠lb bond
60lb double royal 50435⁠3/4⁠lb double crown23⁠1/2⁠lb demy84gsm22⁠1/4⁠lb bond
60lb double royal 51635lb double crown23lb demy82gsm21⁠3/4⁠lb bond
66⁠1/2⁠lb double royal 50040lb double crown26⁠1/4⁠lb demy94gsm24⁠3/4⁠lb bond
72lb double royal 50442⁠3/4⁠lb double crown28⁠1/4⁠lb demy100gsm26⁠3/4⁠lb bond
72lb double royal 51641⁠3/4⁠lb double crown27⁠1/2⁠lb demy98gsm26lb bond
75lb double royal 50045lb double crown29⁠1/2⁠lb demy105gsm28lb bond
80lb double royal 50447⁠1/2⁠lb double crown31⁠1/4⁠lb demy112gsm29⁠3/4⁠lb bond
80lb double royal 51646⁠1/2⁠lb double crown30⁠1/2⁠lb demy109gsm29lb bond
91lb double royal 51653lb double crown34⁠3/4⁠lb demy124gsm33lb bond
100lb double royal 50459⁠1/2⁠lb double crown39lb demy139gsm37lb bond
100lb double royal 51658⁠1/4⁠lb double crown38⁠1/4⁠lb demy136gsm36⁠1/4⁠lb bond
160lb quad royal 50447⁠1/2⁠lb double crown31⁠1/4⁠lb demy112gsm29⁠3/4⁠lb bond
16lb crown 48033⁠1/4⁠lb double crown22lb demy78gsm20⁠3/4⁠lb bond
20lb crown 48041⁠3/4⁠lb double crown27⁠1/4⁠lb demy98gsm26lb bond
27lb crown 48056⁠1/4⁠lb double crown37lb demy132gsm35lb bond
16lb double foolscap 48021⁠3/4⁠lb double crown14⁠1/4⁠lb demy51gsm13⁠1/2⁠lb bond
21lb double foolscap 48028⁠1/2⁠lb double crown18⁠3/4⁠lb demy67gsm17⁠3/4⁠lb bond
22lb double foolscap 48030lb double crown19⁠3/4⁠lb demy70gsm18⁠3/4⁠lb bond
23lb double foolscap 51629⁠1/4⁠lb double crown19lb demy68gsm18⁠1/4⁠lb bond
24lb double foolscap 48032⁠3/4⁠lb double crown21⁠1/2⁠lb demy77gsm20⁠1/4⁠lb bond
25lb double foolscap 51631⁠3/4⁠lb double crown20⁠3/4⁠lb demy74gsm19⁠3/4⁠lb bond
26lb double foolscap 48035⁠1/2⁠lb double crown23⁠1/4⁠lb demy83gsm22lb bond
28lb double foolscap 48038⁠1/4⁠lb double crown25lb demy89gsm23⁠3/4⁠lb bond
28lb double foolscap 51635⁠1/2⁠lb double crown23⁠1/4⁠lb demy83gsm22lb bond
29lb double foolscap 48039⁠1/2⁠lb double crown26lb demy93gsm24⁠1/2⁠lb bond
30lb double foolscap 48040⁠3/4⁠lb double crown26⁠3/4⁠lb demy96gsm25⁠1/2⁠lb bond
30lb double foolscap 51638lb double crown25lb demy89gsm23⁠3/4⁠lb bond
32lb double foolscap 48043⁠1/2⁠lb double crown28⁠1/2⁠lb demy102gsm27⁠1/4⁠lb bond
36lb double foolscap 48049lb double crown32⁠1/4⁠lb demy115gsm30⁠1/2⁠lb bond
36lb double foolscap 51645⁠1/2⁠lb double crown30lb demy107gsm28⁠1/2⁠lb bond
38lb double foolscap 48051⁠3/4⁠lb double crown34lb demy121gsm32⁠1/4⁠lb bond
40lb double foolscap 48054⁠1/2⁠lb double crown35⁠3/4⁠lb demy128gsm34lb bond
45lb double foolscap 48061⁠1/4⁠lb double crown40⁠1/4⁠lb demy144gsm38⁠1/4⁠lb bond
54lb double foolscap 48073⁠1/2⁠lb double crown48⁠1/4⁠lb demy172gsm45⁠3/4⁠lb bond
67lb double foolscap 48091⁠1/4⁠lb double crown59⁠3/4⁠lb demy214gsm56⁠3/4⁠lb bond
46lb quad foolscap 51629⁠1/4⁠lb double crown19lb demy68gsm18⁠1/4⁠lb bond
48lb quad foolscap 50431lb double crown20⁠1/2⁠lb demy73gsm19⁠1/2⁠lb bond
49lb quad foolscap 51631lb double crown20⁠1/4⁠lb demy73gsm19⁠1/4⁠lb bond
50lb quad foolscap 51631⁠3/4⁠lb double crown20⁠3/4⁠lb demy74gsm19⁠3/4⁠lb bond
56lb quad foolscap 50436⁠1/4⁠lb double crown23⁠3/4⁠lb demy85gsm22⁠3/4⁠lb bond
56lb quad foolscap 51635⁠1/2⁠lb double crown23⁠1/4⁠lb demy83gsm22lb bond
60lb quad foolscap 50439lb double crown25⁠1/2⁠lb demy91gsm24⁠1/4⁠lb bond
60lb quad foolscap 51638lb double crown25lb demy89gsm23⁠3/4⁠lb bond
68lb quad foolscap 48046⁠1/4⁠lb double crown30⁠1/2⁠lb demy108gsm28⁠3/4⁠lb bond
64lb quad demy 51623⁠1/2⁠lb double crown15⁠1/2⁠lb demy55gsm14⁠3/4⁠lb bond
80lb quad demy 51629⁠1/2⁠lb double crown19⁠1/2⁠lb demy69gsm18⁠1/2⁠lb bond
84lb quad demy 51631lb double crown20⁠1/4⁠lb demy73gsm19⁠1/4⁠lb bond
96lb quad demy 50436⁠1/4⁠lb double crown23⁠3/4⁠lb demy85gsm22⁠1/2⁠lb bond
120lb quad demy 50445⁠1/4⁠lb double crown29⁠3/4⁠lb demy106gsm28⁠1/4⁠lb bond
120lb quad demy 51644⁠1/4⁠lb double crown29lb demy104gsm27⁠1/2⁠lb bond
30lb imperial (writing and printing) 51626⁠1/2⁠lb double crown17⁠1/4⁠lb demy62gsm16⁠1/2⁠lb bond
36lb imperial (writing and printing) 51631⁠3/4⁠lb double crown20⁠3/4⁠lb demy74gsm19⁠3/4⁠lb bond
40lb imperial (writing and printing) 51635⁠1/4⁠lb double crown23lb demy83gsm22lb bond
46lb imperial (writing and printing) 48043⁠1/2⁠lb double crown28⁠1/2⁠lb demy102gsm27⁠1/4⁠lb bond
50lb imperial (writing and printing) 51644lb double crown29lb demy103gsm27⁠1/2⁠lb bond
56lb imperial (writing and printing) 48053lb double crown34⁠3/4⁠lb demy124gsm33lb bond
60lb imperial (writing and printing) 51652⁠3/4⁠lb double crown34⁠3/4⁠lb demy124gsm33lb bond
70lb imperial (writing and printing) 48066⁠1/4⁠lb double crown43⁠1/2⁠lb demy155gsm41⁠1/4⁠lb bond
120lb imperial (writing and printing) 516105⁠3/4⁠lb double crown69⁠1/4⁠lb demy248gsm65⁠3/4⁠lb bond
13lb post (printing) (pre–⁠1937 standardisation) 48027⁠1/4⁠lb double crown18lb demy64gsm17lb bond
14lb post (printing) (pre–⁠1937 standardisation) 48029⁠1/4⁠lb double crown19⁠1/4⁠lb demy69gsm18⁠1/4⁠lb bond
22lb post (printing) (pre–⁠1937 standardisation) 48046lb double crown30⁠1/4⁠lb demy108gsm28⁠3/4⁠lb bond
23lb post (printing) (pre–⁠1937 standardisation) 48048⁠1/4⁠lb double crown31⁠1/2⁠lb demy113gsm30lb bond
24lb post (printing) (pre–⁠1937 standardisation) 48050⁠1/4⁠lb double crown33lb demy118gsm31⁠1/4⁠lb bond
16lb large post 48028⁠3/4⁠lb double crown19lb demy68gsm18lb bond
17lb large post 48030⁠3/4⁠lb double crown20lb demy72gsm19lb bond
18lb large post 48032⁠1/2⁠lb double crown21⁠1/4⁠lb demy76gsm20⁠1/4⁠lb bond
18lb large post 50031⁠1/4⁠lb double crown20⁠1/2⁠lb demy73gsm19⁠1/2⁠lb bond
21lb large post 48038lb double crown24⁠3/4⁠lb demy89gsm23⁠1/2⁠lb bond
21lb large post 50036⁠1/4⁠lb double crown23⁠3/4⁠lb demy85gsm22⁠3/4⁠lb bond
21lb large post 50436lb double crown23⁠3/4⁠lb demy85gsm22⁠1/2⁠lb bond
24lb large post 48043⁠1/4⁠lb double crown28⁠1/2⁠lb demy101gsm27lb bond
25lb large post 48045lb double crown29⁠1/2⁠lb demy106gsm28lb bond
26lb large post 48047lb double crown30⁠3/4⁠lb demy110gsm29⁠1/4⁠lb bond
27lb large post 48048⁠3/4⁠lb double crown32lb demy114gsm30⁠1/4⁠lb bond
28lb large post 48050⁠1/2⁠lb double crown33lb demy118gsm31⁠1/2⁠lb bond
29lb large post 48052⁠1/4⁠lb double crown34⁠1/4⁠lb demy123gsm32⁠1/2⁠lb bond
30lb large post 48054lb double crown35⁠1/2⁠lb demy127gsm33⁠3/4⁠lb bond
30lb large post 50451⁠1/2⁠lb double crown33⁠3/4⁠lb demy121gsm32lb bond
31lb large post 48056lb double crown36⁠3/4⁠lb demy131gsm34⁠3/4⁠lb bond
32lb large post 48057⁠3/4⁠lb double crown38lb demy135gsm36lb bond
34lb large post 48061⁠1/4⁠lb double crown40⁠1/4⁠lb demy144gsm38⁠1/4⁠lb bond
36lb large post 48065lb double crown42⁠1/2⁠lb demy152gsm40⁠1/2⁠lb bond
44lb large post 48079⁠1/4⁠lb double crown52lb demy186gsm49⁠1/2⁠lb bond
36lb double large post 51630⁠1/4⁠lb double crown19⁠3/4⁠lb demy71gsm18⁠3/4⁠lb bond
60lb double large post 48054lb double crown35⁠1/2⁠lb demy127gsm33⁠3/4⁠lb bond
60lb double large post 50451⁠1/2⁠lb double crown33⁠3/4⁠lb demy121gsm32lb bond
20lb 12⁠1/2⁠″-by-19″ 48052⁠1/2⁠lb double crown34⁠1/2⁠lb demy123gsm32⁠3/4⁠lb bond
25lb 15″-by-22⁠1/2⁠″ 48046⁠1/4⁠lb double crown30⁠1/4⁠lb demy108gsm28⁠3/4⁠lb bond
25lb 15″-by-23″ 48045⁠1/4⁠lb double crown29⁠3/4⁠lb demy106gsm28⁠1/4⁠lb bond
20lb 15⁠1/2⁠″-by-18″ 48044⁠3/4⁠lb double crown29⁠1/2⁠lb demy105gsm28lb bond
25lb 17″-by-23″ 48040lb double crown26⁠1/4⁠lb demy94gsm25lb bond
30lb 17″-by-23″ 48048lb double crown31⁠1/2⁠lb demy112gsm30lb bond
67lb 20⁠1/2⁠″-by-25⁠1/2⁠″ 50077lb double crown50⁠1/2⁠lb demy180gsm48lb bond
84lb 20⁠1/2⁠″-by-25⁠1/2⁠″ 50096⁠1/2⁠lb double crown63⁠1/4⁠lb demy226gsm60lb bond
100lb 20⁠1/2⁠″-by-25⁠1/2⁠″ 500114⁠3/4⁠lb double crown75⁠1/4⁠lb demy269gsm71⁠1/2⁠lb bond
118lb 20⁠1/2⁠″-by-25⁠1/2⁠″ 500135⁠1/2⁠lb double crown88⁠3/4⁠lb demy317gsm84⁠1/2⁠lb bond
80lb 20⁠1/2⁠″-by-30⁠1/2⁠″ 50076⁠3/4⁠lb double crown50⁠1/4⁠lb demy180gsm47⁠3/4⁠lb bond
100lb 20⁠1/2⁠″-by-30⁠1/2⁠″ 50096lb double crown63lb demy225gsm59⁠3/4⁠lb bond
120lb 20⁠1/2⁠″-by-30⁠1/2⁠″ 500115⁠1/4⁠lb double crown75⁠1/2⁠lb demy270gsm71⁠3/4⁠lb bond
140lb 20⁠1/2⁠″-by-30⁠1/2⁠″ 500134⁠1/4⁠lb double crown88⁠1/4⁠lb demy315gsm83⁠3/4⁠lb bond
36lb 21″-by-29″ 51634⁠1/4⁠lb double crown22⁠1/2⁠lb demy81gsm21⁠1/2⁠lb bond
75lb 21″-by-30⁠1/2⁠″ 50469⁠3/4⁠lb double crown45⁠3/4⁠lb demy163gsm43⁠1/2⁠lb bond
106lb 22″-by-25″ 500115⁠3/4⁠lb double crown75⁠3/4⁠lb demy271gsm72lb bond
124lb 22″-by-25″ 500135⁠1/4⁠lb double crown88⁠3/4⁠lb demy317gsm84⁠1/4⁠lb bond
190lb 22″-by-25″ 500207⁠1/4⁠lb double crown136lb demy486gsm129⁠1/4⁠lb bond
122lb 22″-by-29″ 500114⁠3/4⁠lb double crown75⁠1/4⁠lb demy269gsm71⁠1/2⁠lb bond
144lb 22″-by-29″ 500135⁠1/2⁠lb double crown88⁠3/4⁠lb demy317gsm84⁠1/2⁠lb bond
220lb 22″-by-29″ 500207lb double crown135⁠3/4⁠lb demy485gsm129lb bond
Wrapping paper
Common British basis weights

(various paper sizes and ream sizes)

Equivalent weight of a 500‑sheet ream of double imperial paper, a British wrapping paper commonly used to express the basis weight of wrapping paper

(rounded to the nearest quarter)

(a common British basis for intra‑category comparison)

Equivalent weight of a 500‑sheet ream of demy paper, a British uncut printing paper commonly used by default to express the basis weight of different types of paper [a]

(rounded to the nearest quarter)

(a common British basis for cross‑category comparison)

Equivalent grammage

(rounded to the nearest one)

Equivalent weight of a 500‑sheet ream of bond paper, an American uncut paper commonly used to express the basis weight of paper

(rounded to the nearest quarter)

(a common American basis for cross‑category comparison)

28lb bag cap (pre–⁠1937 standardisation) 48081⁠1/4⁠lb double imperial (wrapping)24⁠1/2⁠lb demy88gsm23⁠1/4⁠lb bond
40lb bag cap (pre–⁠1937 standardisation) 480116⁠1/4⁠lb double imperial (wrapping)35lb demy125gsm33⁠1/4⁠lb bond
50lb casing 48041lb double imperial (wrapping)12⁠1/2⁠lb demy44gsm11⁠3/4⁠lb bond
60lb casing 48049⁠1/4⁠lb double imperial (wrapping)14⁠3/4⁠lb demy53gsm14lb bond
70lb casing 48057⁠1/2⁠lb double imperial (wrapping)17⁠1/4⁠lb demy62gsm16⁠1/2⁠lb bond
80lb casing 48065⁠3/4⁠lb double imperial (wrapping)19⁠3/4⁠lb demy71gsm18⁠3/4⁠lb bond
100lb casing 48082lb double imperial (wrapping)24⁠3/4⁠lb demy88gsm23⁠1/2⁠lb bond
120lb casing 48098⁠1/2⁠lb double imperial (wrapping)29⁠3/4⁠lb demy106gsm28⁠1/4⁠lb bond
140lb casing 480115lb double imperial (wrapping)34⁠3/4⁠lb demy124gsm33lb bond
160lb casing 480131⁠1/4⁠lb double imperial (wrapping)39⁠3/4⁠lb demy142gsm37⁠3/4⁠lb bond
13lb double crown 48029⁠1/2⁠lb double imperial (wrapping)9lb demy32gsm8⁠1/2⁠lb bond
15lb double crown 48034lb double imperial (wrapping)10⁠1/4⁠lb demy37gsm9⁠3/4⁠lb bond
19lb double crown 48043lb double imperial (wrapping)13lb demy46gsm12⁠1/4⁠lb bond
23lb double crown 48052lb double imperial (wrapping)15⁠3/4⁠lb demy56gsm15lb bond
24lb double crown 48054⁠1/2⁠lb double imperial (wrapping)16⁠1/2⁠lb demy59gsm15⁠1/2⁠lb bond
47lb double crown 480106⁠1/2⁠lb double imperial (wrapping)32lb demy115gsm30⁠1/2⁠lb bond
80lb double crown 480181⁠1/4⁠lb double imperial (wrapping)54⁠3/4⁠lb demy195gsm52lb bond
100lb double crown 480226⁠1/2⁠lb double imperial (wrapping)68⁠1/4⁠lb demy244gsm65lb bond
120lb double crown 480272lb double imperial (wrapping)82lb demy293gsm78lb bond
34lb quad crown 48038⁠1/2⁠lb double imperial (wrapping)11⁠1/2⁠lb demy42gsm11lb bond
38lb quad crown 48043lb double imperial (wrapping)13lb demy46gsm12⁠1/4⁠lb bond
48lb quad crown 50451⁠3/4⁠lb double imperial (wrapping)15⁠1/2⁠lb demy56gsm14⁠3/4⁠lb bond
120lb quad crown 516126⁠1/2⁠lb double imperial (wrapping)38⁠1/4⁠lb demy136gsm36⁠1/4⁠lb bond
15lb demy 48051⁠3/4⁠lb double imperial (wrapping)15⁠3/4⁠lb demy56gsm14⁠3/4⁠lb bond
26lb double demy 48045lb double imperial (wrapping)13⁠1/2⁠lb demy48gsm12⁠3/4⁠lb bond
29lb double demy 51646⁠1/2⁠lb double imperial (wrapping)14lb demy50gsm13⁠1/4⁠lb bond
30lb double demy 48051⁠3/4⁠lb double imperial (wrapping)15⁠3/4⁠lb demy56gsm14⁠3/4⁠lb bond
34lb double demy 48058⁠3/4⁠lb double imperial (wrapping)17⁠3/4⁠lb demy63gsm16⁠3/4⁠lb bond
60lb double demy 480103⁠1/2⁠lb double imperial (wrapping)31⁠1/4⁠lb demy112gsm29⁠3/4⁠lb bond
200lb extra large casing 480141⁠1/2⁠lb double imperial (wrapping)42⁠3/4⁠lb demy153gsm40⁠1/2⁠lb bond
50lb imperial (wrapping) 480104⁠1/4⁠lb double imperial (wrapping)31⁠1/2⁠lb demy112gsm29⁠3/4⁠lb bond
60lb imperial (wrapping) 480125lb double imperial (wrapping)37⁠3/4⁠lb demy135gsm35⁠3/4⁠lb bond
70lb imperial (wrapping) 480145⁠3/4⁠lb double imperial (wrapping)44lb demy157gsm41⁠3/4⁠lb bond
140lb imperial (wrapping) 480291⁠3/4⁠lb double imperial (wrapping)88lb demy314gsm83⁠1/2⁠lb bond
60lb double imperial (wrapping) 48062⁠1/2⁠lb double imperial (wrapping)18⁠3/4⁠lb demy67gsm18lb bond
65lb double imperial (wrapping) 48067⁠3/4⁠lb double imperial (wrapping)20⁠1/2⁠lb demy73gsm19⁠1/2⁠lb bond
80lb double imperial (wrapping) 48083⁠1/4⁠lb double imperial (wrapping)25⁠1/4⁠lb demy90gsm24lb bond
100lb double imperial (wrapping) 480104⁠1/4⁠lb double imperial (wrapping)31⁠1/2⁠lb demy112gsm29⁠3/4⁠lb bond
120lb double imperial (wrapping) 480125lb double imperial (wrapping)37⁠3/4⁠lb demy135gsm35⁠3/4⁠lb bond
140lb double imperial (wrapping) 480145⁠3/4⁠lb double imperial (wrapping)44lb demy157gsm41⁠3/4⁠lb bond
160lb double imperial (wrapping) 480166⁠3/4⁠lb double imperial (wrapping)50⁠1/4⁠lb demy180gsm47⁠3/4⁠lb bond
240lb double imperial (wrapping) 480250lb double imperial (wrapping)75⁠1/2⁠lb demy269gsm71⁠3/4⁠lb bond
240lb double double imperial 480125lb double imperial (wrapping)37⁠3/4⁠lb demy135gsm35⁠3/4⁠lb bond
280lb double double imperial 480145⁠3/4⁠lb double imperial (wrapping)44lb demy157gsm41⁠3/4⁠lb bond
19lb small royal 48056⁠3/4⁠lb double imperial (wrapping)17lb demy61gsm16⁠1/4⁠lb bond
34lb quad small hand 48038⁠1/2⁠lb double imperial (wrapping)11⁠1/2⁠lb demy42gsm11lb bond
38lb quad small hand 48043lb double imperial (wrapping)13lb demy46gsm12⁠1/4⁠lb bond
48lb quad small hand 50451⁠3/4⁠lb double imperial (wrapping)15⁠1/2⁠lb demy56gsm14⁠3/4⁠lb bond
14lb 18″-by-26″ 48040⁠3/4⁠lb double imperial (wrapping)12⁠1/4⁠lb demy44gsm11⁠3/4⁠lb bond
15lb 18″-by-26″ 48043⁠1/2⁠lb double imperial (wrapping)13⁠1/4⁠lb demy47gsm12⁠1/2⁠lb bond
190lb 22″-by-25″ 500450⁠3/4⁠lb double imperial (wrapping)136lb demy486gsm129⁠1/4⁠lb bond
220lb 22″-by-29″ 500450lb double imperial (wrapping)135⁠3/4⁠lb demy485gsm129lb bond
32lb 25⁠1/2⁠″-by-35″ 48048⁠3/4⁠lb double imperial (wrapping)14⁠3/4⁠lb demy53gsm14lb bond
26lb 30″-by-38″ 48031lb double imperial (wrapping)9⁠1/4⁠lb demy33gsm8⁠3/4⁠lb bond
30lb 30″-by-38″ 48035⁠3/4⁠lb double imperial (wrapping)10⁠3/4⁠lb demy39gsm10⁠1/4⁠lb bond
42lb 30″-by-38″ 48050lb double imperial (wrapping)15lb demy54gsm14⁠1/4⁠lb bond
180lb 38″-by-48″ 480134⁠1/4⁠lb double imperial (wrapping)40⁠1/2⁠lb demy145gsm38⁠1/2⁠lb bond

Conversion between British basis weights, American basis weights, and grammage

It is possible to convert between different basis weights – both British and American – and grammage using different conversion formulae.

To convert between the basis weights of different paper with the same basis‑ream size (e. g., from lb large post 500 to lb demy 500), the following formula can be employed: [13]

Area of one sheet of paper in the target ream × Weight of the source ream ÷ Area of one sheet of paper in the source ream

To convert between the basis weights of different paper with different basis‑ream sizes (e. g., from lb large post 480 to lb demy 500), the relevant formula is below:

(Number of sheets of paper in the target ream × Area of one sheet of paper in the target ream) × Weight of the source ream ÷ (Number of sheets of paper in the source ream × Area of one sheet of paper in the source ream) [b]

To convert between the basis weights of the same paper with different basis‑ream sizes (e. g., from lb large post 480 to lb large post 500), one may either use the previous formula or the one below:

Weight of the source ream × Applicable conversion factor from the table below [14]

To →

From ↓

480500504516
480…1·0421·051·075
5000·96…1·011·032
5040·950·992…1·022
5160·930·9690·977…

To convert from a basis weight to its equivalent grammage, the following is the applicable formula: [15]

Weight of the basis ream × 703,125 ÷ Area of one sheet of paper in the basis ream in square inch × Number of sheets of paper in the basis ream

To convert from grammage to the equivalent basis weight, the formula below can be used: [15]

Area of one sheet of paper in the basis ream in square inch × Number of sheets of paper in the basis ream × Value of gram per square metre ÷ 703,125

Utilising the aforementioned formulae, it is possible to work out the conversion factors for converting between various British and American units of basis weight and the gram per square metre:

Table of conversion factors for British units of basis weight (standardised basis sizes and 500‑sheet basis reams only) and their metric and American equivalents
Note 1:
Value of lb demy × Relevant conversion factor = Value of the unit in the left column

Note 2:
Value of a unit in the left column ÷ Relevant conversion factor = Value of lb demy

Note 3:
To convert between any two units in the left column, Value of the source unit × (Conversion factor for the target unit ÷ Conversion factor for the source unit)

Note 4:
Note that, as a matter of mathematical relationship, 1 ‘single’ unit (e. g., lb foolscap) is always equal to 2 ‘double’ unit (e. g., lb double foolscap) and 4 ‘quad’ unit (e. g., lb quad foolscap), respectively. By the same token, 1 ‘double’ unit is always equal to ⁠1/2⁠ ‘single’ unit and 2 ‘quad’ unit, respectively; and 1 ‘quad’ unit is always equal to ⁠1/2⁠ ‘double’ unit and ⁠1/4⁠ ‘single’ unit, respectively. Due to the rounding of the conversion factors in this table, calculating with the conversion factors alone may not produce such results automatically.

lb demy [c] (UK)
lb bag cap (UK)1·219047
lb casing (the definition on the island of Great Britain) (UK)4·205713
lb casing (the definition on the island of Ireland) (UK)4·388570
lb double crown (UK)1·523809
lb double demy (UK)2
lb double double imperial (UK)6·628570
lb double elephant (UK)2·742856
lb double foolscap (UK)1·165714
lb double imperial (writing and printing) (UK)3·352380
lb double imperial (wrapping) (UK)3·314285
lb double large post (UK)1·759999
lb double medium (UK)2·102856
lb double post (UK)1·447619
lb double royal (UK)2·539681
lb double small demy (UK)1·574603
lb double small foolscap (UK)1·110475
lb extra large casing (UK)4·876188
lb foolscap (UK)0·582857
lb imperial (writing and printing) (UK)1·676190
lb imperial (wrapping) (UK)1·657142
lb large post (UK)0·880000
lb large royal (UK)1·405713
lb medium (UK)1·051428
lb post (UK)0·723809
lb quad crown (UK)3·047619
lb quad demy (UK)4
lb quad foolscap (UK)2·331429
lb royal (UK)1·269840
lb saddleback (UK)4·114285
lb sheet‑and‑a‑half small foolscap (UK)0·832857
lb sheet‑and‑a‑third small foolscap (UK)0·740317
lb small demy (UK)0·787301
lb small foolscap (UK)0·555237
lb small royal (UK)1·158094
gsm (metric)3·571142
lb bond (US)0·949841
lb Bristol (US)1·628571
lb cover (US)1·320634
lb index (US)1·975236
lb tag (US)2·194284
lb text (US)2·412696
Table of conversion factors for British units of basis weight (all basis sizes and basis‑ream sizes) and their metric and American equivalents
Note 1:
Value of lb demy 500 × Relevant conversion factor = Value of the unit in the left column

Note 2:
Value of a unit in the left column ÷ Relevant conversion factor = Value of lb demy 500

Note 3:
To convert between any two units in the left column, Value of the source unit × (Conversion factor for the target unit ÷ Conversion factor for the source unit)

Note 4:
Note that, as a matter of mathematical relationship, as long as the ream size is the same, 1 ‘single’ unit (e. g., lb crown 500) is always equal to 2 ‘double’ unit (e. g., lb double crown 500) and 4 ‘quad’ unit (e. g., lb quad crown 500), respectively. By the same token, 1 ‘double’ unit is always equal to ⁠1/2⁠ ‘single’ unit and 2 ‘quad’ unit, respectively; and 1 ‘quad’ unit is always equal to ⁠1/2⁠ ‘double’ unit and ⁠1/4⁠ ‘single’ unit, respectively. Due to the rounding of the conversion factors in this table, calculating with the conversion factors alone may not produce such results automatically.

lb demy 500 [d] (UK)
lb atlas 480 (UK)2·155275
lb atlas 500 (UK)2·245079
lb atlas 504 (UK)2·263039
lb atlas 516 (UK)2·316921
lb bag cap 480 (the pre–‍1937 standardisation definition) (UK)1·141027
lb bag cap 500 (the pre–‍1937 standardisation definition) (UK)1·188571
lb bag cap 504 (the pre–‍1937 standardisation definition) (UK)1·198079
lb bag cap 516 (the pre–‍1937 standardisation definition) (UK)1·226605
lb bag cap 480 (UK)1·170285
lb bag cap 500 (UK)1·219047
lb bag cap 504 (UK)1·228799
lb bag cap 516 (UK)1·258056
lb casing 480 (definition on the island of Great Britain) (UK)4·037483
lb casing 500 (definition on the island of Great Britain) (UK)4·205713
lb casing 504 (definition on the island of Great Britain) (UK)4·239357
lb casing 516 (definition on the island of Great Britain) (UK)4·340294
lb casing 480 (definition on the island of Ireland) (UK)4·213026
lb casing 500 (definition on the island of Ireland) (UK)4·388570
lb casing 504 (definition on the island of Ireland) (UK)4·423677
lb casing 516 (definition on the island of Ireland) (UK)4·529003
lb copy 480 (UK)0·804571
lb copy 500 (UK)0·838095
lb copy 504 (UK)0·844799
lb copy 516 (UK)0·864914
lb crown 480 (UK)0·731428
lb crown 500 (UK)0·761905
lb crown 504 (UK)0·768000
lb crown 516 (UK)0·786285
lb demy 480 (UK)0·960000
lb demy 504 (UK)1·008000
lb demy 516 (UK)1·032000
lb double bag cap 480 (UK)2·282055
lb double bag cap 500 (UK)2·377142
lb double bag cap 504 (UK)2·396159
lb double bag cap 516 (UK)2·453210
lb double crown 480 (UK)1·462856
lb double crown 500 (UK)1·523809
lb double crown 504 (UK)1·535999
lb double crown 516 (UK)1·572571
lb double demy 480 (UK)1·919999
lb double demy 500 (UK)2
lb double demy 504 (UK)2·015999
lb double demy 516 (UK)2·063999
lb double double imperial 480 (UK)6·363425
lb double double imperial 500 (UK)6·628570
lb double double imperial 504 (UK)6·681596
lb double double imperial 516 (UK)6·840682
lb double elephant (writing and printing) 480 (UK)2·633141
lb double elephant (writing and printing) 500 (UK)2·742856
lb double elephant (writing and printing) 504 (UK)2·764798
lb double elephant (writing and printing) 516 (UK)2·830627
lb double elephant (wrapping) 480 (UK)3·476721
lb double elephant (wrapping) 500 (UK)3·621586
lb double elephant (wrapping) 504 (UK)3·650557
lb double elephant (wrapping) 516 (UK)3·737475
lb double foolscap 480 (UK)1·119085
lb double foolscap 500 (UK)1·165714
lb double foolscap 504 (UK)1·175040
lb double foolscap 516 (UK)1·203017
lb double globe 480 (UK)2·594132
lb double globe 500 (UK)2·702221
lb double globe 504 (UK)2·723838
lb double globe 516 (UK)2·788691
lb double imperial (writing and printing) 480 (UK)3·218284
lb double imperial (writing and printing) 500 (UK)3·352380
lb double imperial (writing and printing) 504 (UK)3·379198
lb double imperial (writing and printing) 516 (UK)3·459655
lb double imperial (wrapping) 480 (UK)3·181712
lb double imperial (wrapping) 500 (UK)3·314285
lb double imperial (wrapping) 504 (UK)3·340798
lb double imperial (wrapping) 516 (UK)3·420341
lb double large post 480 (UK)1·689599
lb double large post 500 (UK)1·759999
lb double large post 504 (UK)1·774079
lb double large post 516 (UK)1·816319
lb double medium 480 (UK)2·018741
lb double medium 500 (UK)2·102856
lb double medium 504 (UK)2·119678
lb double medium 516 (UK)2·170147
lb double post (writing) 480 (the pre–‍1937 standardisation definition) (UK)1·412875
lb double post (writing) 500 (the pre–‍1937 standardisation definition) (UK)1·471745
lb double post (writing) 504 (the pre–‍1937 standardisation definition) (UK)1·483518
lb double post (writing) 516 (the pre–‍1937 standardisation definition) (UK)1·518840
lb double post (printing) 480 (the pre–‍1937 standardisation definition) (UK)1·454932
lb double post (printing) 500 (the pre–‍1937 standardisation definition) (UK)1·515555
lb double post (printing) 504 (the pre–‍1937 standardisation definition) (UK)1·527679
lb double post (printing) 516 (the pre–‍1937 standardisation definition) (UK)1·564052
lb double post 480 (UK)1·389714
lb double post 500 (UK)1·447619
lb double post 504 (UK)1·459199
lb double post 516 (UK)1·493942
lb double pott 480 (UK)0·914285
lb double pott 500 (UK)0·952380
lb double pott 504 (UK)0·959999
lb double pott 516 (UK)0·982856
lb double royal 480 (UK)2·438093
lb double royal 500 (UK)2·539681
lb double royal 504 (UK)2·559998
lb double royal 516 (UK)2·620950
lb double small cap 480 (UK)2·072379
lb double small cap 500 (UK)2·158729
lb double small cap 504 (UK)2·175998
lb double small cap 516 (UK)2·227808
lb double small demy 480 (UK)1·511618
lb double small demy 500 (UK)1·574603
lb double small demy 504 (UK)1·587199
lb double small demy 516 (UK)1·624990
lb double small foolscap 480 (UK)1·066056
lb double small foolscap 500 (UK)1·110475
lb double small foolscap 504 (UK)1·119359
lb double small foolscap 516 (UK)1·146010
lb double small hand 480 (UK)1·414095
lb double small hand 500 (UK)1·473016
lb double small hand 504 (UK)1·484799
lb double small hand 516 (UK)1·520152
lb double small royal 480 (UK)2·223541
lb double small royal 500 (UK)2·316189
lb double small royal 504 (UK)2·334718
lb double small royal 516 (UK)2·620950
lb elephant (writing and printing) 480 (UK)1·570132
lb elephant (writing and printing) 500 (UK)1·635555
lb elephant (writing and printing) 504 (UK)1·648639
lb elephant (writing and printing) 516 (UK)1·687892
lb elephant (wrapping) 480 (UK)1·872456
lb elephant (wrapping) 500 (UK)1·950475
lb elephant (wrapping) 504 (UK)1·966078
lb elephant (wrapping) 516 (UK)2·012890
lb extra large casing 480 (UK)4·681139
lb extra large casing 500 (UK)4·876188
lb extra large casing 504 (UK)4·915196
lb extra large casing 516 (UK)5·032225
lb foolscap 480 (UK)0·559543
lb foolscap 500 (UK)0·582857
lb foolscap 504 (UK)0·587520
lb foolscap 516 (UK)0·601508
lb haven cap 480 (UK)1·331199
lb haven cap 500 (UK)1·386666
lb haven cap 504 (UK)1·397759
lb haven cap 516 (UK)1·431039
lb imperial (writing and printing) 480 (UK)1·609142
lb imperial (writing and printing) 500 (UK)1·676190
lb imperial (writing and printing) 504 (UK)1·689599
lb imperial (writing and printing) 516 (UK)1·729827
lb imperial (wrapping) 480 (UK)1·590856
lb imperial (wrapping) 500 (UK)1·657142
lb imperial (wrapping) 504 (UK)1·670399
lb imperial (wrapping) 516 (UK)1·710170
lb Kent cap 480 (UK)0·959999
lb Kent cap 500 (UK)0·999999
lb Kent cap 504 (UK)1·007999
lb Kent cap 516 (UK)1·031999
lb large post 480 (UK)0·844799
lb large post 500 (UK)0·880000
lb large post 504 (UK)0·887039
lb large post 516 (UK)0·908159
lb large royal 480 (the pre–‍1937 standardisation definition) (UK)1·316571
lb large royal 500 (the pre–‍1937 standardisation definition) (UK)1·371428
lb large royal 504 (the pre–‍1937 standardisation definition) (UK)1·382399
lb large royal 516 (the pre–‍1937 standardisation definition) (UK)1·415314
lb large royal 480 (UK)1·349484
lb large royal 500 (UK)1·405713
lb large royal 504 (UK)1·416958
lb large royal 516 (UK)1·450696
lb lumber hand 480 (UK)0·960000
lb lumber hand 500 (UK)1
lb lumber hand 504 (UK)1·008000
lb lumber hand 516 (UK)1·032000
lb medium 480 (UK)1·009371
lb medium 500 (UK)1·051428
lb medium 504 (UK)1·059839
lb medium 516 (UK)1·085073
lb music demy 480 (UK)0·727238
lb music demy 500 (UK)0·757540
lb music demy 504 (UK)0·763600
lb music demy 516 (UK)0·781781
lb pinched post 480 (UK)0·665295
lb pinched post 500 (UK)0·693016
lb pinched post 504 (UK)0·698559
lb pinched post 516 (UK)0·715192
lb post (writing) 480 (the pre–‍1925 standardisation definition) (UK)0·706437
lb post (writing) 500 (the pre–‍1925 standardisation definition) (UK)0·735872
lb post (writing) 504 (the pre–‍1925 standardisation definition) (UK)0·741759
lb post (writing) 516 (the pre–‍1925 standardisation definition) (UK)0·759420
lb post (printing) 480 (the pre–‍1925 standardisation definition) (UK)0·727466
lb post (printing) 500 (the pre–‍1925 standardisation definition) (UK)0·757777
lb post (printing) 504 (the pre–‍1925 standardisation definition) (UK)0·763839
lb post (printing) 516 (the pre–‍1925 standardisation definition) (UK)0·782026
lb post 480 (UK)0·694857
lb post 500 (UK)0·723809
lb post 504 (UK)0·729600
lb post 516 (UK)0·746971
lb pott 480 (UK)0·457143
lb pott 500 (UK)0·476191
lb pott 504 (UK)0·480000
lb pott 516 (UK)0·491429
lb quad crown 480 (UK)2·925713
lb quad crown 500 (UK)3·047619
lb quad crown 504 (UK)3·071998
lb quad crown 516 (UK)3·145141
lb quad demy 480 (UK)3·839999
lb quad demy 500 (UK)4
lb quad demy 504 (UK)4·031999
lb quad demy 516 (UK)4·127999
lb quad foolscap 480 (UK)2·238171
lb quad foolscap 500 (UK)2·331429
lb quad foolscap 504 (UK)2·350080
lb quad foolscap 516 (UK)2·406034
lb quad globe 480 (UK)5·188263
lb quad globe 500 (UK)5·404442
lb quad globe 504 (UK)5·447676
lb quad globe 516 (UK)5·577383
lb quad pott 480 (UK)1·828572
lb quad pott 500 (UK)1·904763
lb quad pott 504 (UK)1·920000
lb quad pott 516 (UK)1·965715
lb quad royal 480 (UK)4·876186
lb quad royal 500 (UK)5·079362
lb quad royal 504 (UK)5·119995
lb quad royal 516 (UK)5·241900
lb quad small hand 480 (UK)2·925712
lb quad small hand 500 (UK)3·047618
lb quad small hand 504 (UK)3·071998
lb quad small hand 516 (UK)3·145140
lb royal 480 (UK)1·219046
lb royal 500 (UK)1·269840
lb royal 504 (UK)1·279999
lb royal 516 (UK)1·310475
lb saddleback 480 (UK)3·949712
lb saddleback 500 (UK)4·114285
lb saddleback 504 (UK)4·147198
lb saddleback 516 (UK)4·245940
lb sheet‑and‑a‑half small foolscap 480 (the pre–‍1925 standardisation definition) (UK)0·791466
lb sheet‑and‑a‑half small foolscap 500 (the pre–‍1925 standardisation definition) (UK)0·824444
lb sheet‑and‑a‑half small foolscap 504 (the pre–‍1925 standardisation definition) (UK)0·831040
lb sheet‑and‑a‑half small foolscap 516 (the pre–‍1925 standardisation definition) (UK)0·850826
lb sheet‑and‑a‑half small foolscap 480 (UK)0·799543
lb sheet‑and‑a‑half small foolscap 500 (UK)0·832857
lb sheet‑and‑a‑half small foolscap 504 (UK)0·839520
lb sheet‑and‑a‑half small foolscap 516 (UK)0·859508
lb sheet‑and‑a‑third small foolscap 480 (UK)0·710704
lb sheet‑and‑a‑third small foolscap 500 (UK)0·740317
lb sheet‑and‑a‑third small foolscap 504 (UK)0·746240
lb sheet‑and‑a‑third small foolscap 516 (UK)0·764007
lb small cap 480 (UK)1·036190
lb small cap 500 (UK)1·079364
lb small cap 504 (UK)1·087999
lb small cap 516 (UK)1·113904
lb small demy 480 (UK)0·755809
lb small demy 500 (UK)0·787301
lb small demy 504 (UK)0·793599
lb small demy 516 (UK)0·812495
lb small foolscap 480 (UK)0·533028
lb small foolscap 500 (UK)0·555237
lb small foolscap 504 (UK)0·559679
lb small foolscap 516 (UK)0·573005
lb small hand 480 (UK)0·731428
lb small hand 500 (UK)0·761905
lb small hand 504 (UK)0·768000
lb small hand 516 (UK)0·786285
lb small medium 480 (UK)0·938666
lb small medium 500 (UK)0·977777
lb small medium 504 (UK)0·985599
lb small medium 516 (UK)1·009066
lb small post 480 (UK)0·654018
lb small post 500 (UK)0·681269
lb small post 504 (UK)0·686719
lb small post 516 (UK)0·703070
lb small royal 480 (UK)1·111770
lb small royal 500 (UK)1·158094
lb small royal 504 (UK)1·167359
lb small royal 516 (UK)1·195153
lb super royal (writing) 480 (the pre–‍1925 standardisation definition) (UK)1·267199
lb super royal (writing) 500 (the pre–‍1925 standardisation definition) (UK)1·319999
lb super royal (writing) 504 (the pre–‍1925 standardisation definition) (UK)1·330559
lb super royal (writing) 516 (the pre–‍1925 standardisation definition) (UK)1·362239
lb super royal (printing) 480 (the pre–‍1925 standardisation definition) (UK)1·374475
lb super royal (printing) 500 (the pre–‍1925 standardisation definition) (UK)1·431745
lb super royal (printing) 504 (the pre–‍1925 standardisation definition) (UK)1·443199
lb super royal (printing) 516 (the pre–‍1925 standardisation definition) (UK)1·477561
lb super royal 480 (UK)1·250742
lb super royal 500 (UK)1·302856
lb super royal 504 (UK)1·313279
lb super royal 516 (UK)1·344547
lb 20″‑by‑24″ 480 (UK)1·170285
lb 20″‑by‑24″ 500 (UK)1·219047
lb 20″‑by‑24″ 504 (UK)1·228799
lb 20″‑by‑24″ 516 (UK)1·258056
lb 20″‑by‑28″ 480 (UK)1·365333
lb 20″‑by‑28″ 500 (UK)1·422222
lb 20″‑by‑28″ 504 (UK)1·433599
lb 20″‑by‑28″ 516 (UK)1·467733
lb 21″‑by‑31″ 480 (UK)1·587199
lb 21″‑by‑31″ 500 (UK)1·653333
lb 21″‑by‑31″ 504 (UK)1·666559
lb 21″‑by‑31″ 516 (UK)1·706239
lb 21″‑by‑34″ 480 (UK)1·740799
lb 21″‑by‑34″ 500 (UK)1·813333
lb 21″‑by‑34″ 504 (UK)1·827839
lb 21″‑by‑34″ 516 (UK)1·871359
lb 22″‑by‑32″ 480 (UK)1·716418
lb 22″‑by‑32″ 500 (UK)1·787936
lb 22″‑by‑32″ 504 (UK)1·802239
lb 22″‑by‑32″ 516 (UK)1·845149
lb 22″‑by‑35″ 480 (UK)1·877332
lb 22″‑by‑35″ 500 (UK)1·955555
lb 22″‑by‑35″ 504 (UK)1·971198
lb 22″‑by‑35″ 516 (UK)2·018132
lb 23″‑by‑34″ 480 (UK)1·906589
lb 23″‑by‑34″ 500 (UK)1·986031
lb 23″‑by‑34″ 504 (UK)2·001918
lb 23″‑by‑34″ 516 (UK)2·049583
lb 24″‑by‑30″ 480 (UK)1·755427
lb 24″‑by‑30″ 500 (UK)1·828571
lb 24″‑by‑30″ 504 (UK)1·843199
lb 24″‑by‑30″ 516 (UK)1·887084
lb 24″‑by‑36″ 480 (UK)2·106512
lb 24″‑by‑36″ 500 (UK)2·194284
lb 24″‑by‑36″ 504 (UK)2·211838
lb 24″‑by‑36″ 516 (UK)2·264501
lb 24″‑by‑40″ 480 (UK)2·340569
lb 24″‑by‑40″ 500 (UK)2·438094
lb 24″‑by‑40″ 504 (UK)2·457598
lb 24″‑by‑40″ 516 (UK)2·516112
lb 26″‑by‑36″ 480 (UK)2·282056
lb 26″‑by‑36″ 500 (UK)2·377142
lb 26″‑by‑36″ 504 (UK)2·396159
lb 26″‑by‑36″ 516 (UK)2·453210
lb 28″‑by‑45″ 480 (UK)3·071998
lb 28″‑by‑45″ 500 (UK)3·199999
lb 28″‑by‑45″ 504 (UK)3·225598
lb 28″‑by‑45″ 516 (UK)3·302398
lb 29″‑by‑44″ 480 (UK)3·111008
lb 29″‑by‑44″ 500 (UK)3·240634
lb 29″‑by‑44″ 504 (UK)3·266558
lb 29″‑by‑44″ 516 (UK)3·344333
lb 30″‑by‑38″ 480 (UK)2·779426
lb 30″‑by‑38″ 500 (UK)2·895237
lb 30″‑by‑38″ 504 (UK)2·918398
lb 30″‑by‑38″ 516 (UK)2·987883
lb 30″‑by‑46″ 480 (UK)3·364569
lb 30″‑by‑46″ 500 (UK)3·504761
lb 30″‑by‑46″ 504 (UK)3·532798
lb 30″‑by‑46″ 516 (UK)3·616912
lb 34″‑by‑36″ 480 (UK)2·984227
lb 34″‑by‑36″ 500 (UK)3·108571
lb 34″‑by‑36″ 504 (UK)3·133438
lb 34″‑by‑36″ 516 (UK)3·208044
lb 36″‑by‑36″ 480 (UK)3·159770
lb 36″‑by‑36″ 500 (UK)3·291428
lb 36″‑by‑36″ 504 (UK)3·317758
lb 36″‑by‑36″ 516 (UK)3·396752
lb 36″‑by‑48″ 480 (UK)4·213026
lb 36″‑by‑48″ 500 (UK)4·388570
lb 36″‑by‑48″ 504 (UK)4·423677
lb 36″‑by‑48″ 516 (UK)4·529003
lb 38″‑by‑48″ 480 (UK)4·447083
lb 38″‑by‑48″ 500 (UK)4·632379
lb 38″‑by‑48″ 504 (UK)4·669437
lb 38″‑by‑48″ 516 (UK)4·780614
lb 45″‑by‑56″ 480 (UK)6·143996
lb 45″‑by‑56″ 500 (UK)6·399998
lb 45″‑by‑56″ 504 (UK)6·451196
lb 45″‑by‑56″ 516 (UK)6·604796
gsm (metric)3·571142
lb bond (US)0·949841
lb Bristol (US)1·628571
lb cover (US)1·320634
lb index (US)1·975236
lb tag (US)2·194284
lb text (US)2·412696

Using British basis sizes and the 500‑sheet basis‑ream (a traditional British basis‑ream size that coincides with the modern standard definition of ‘ream’), and with the help of the aforementioned conversion formulae or conversion factors, it is possible to express the paper weights of different types of paper in everyday life using British units of basis weight: the typical photocopier paper that is used as all‑purpose paper is 17⁠1/4⁠ or 19⁠3/4⁠lb large post (70 or 80gsm); [16] personal and business letter paper, especially that with engraved letterheads, is typically 24⁠3/4⁠–29⁠1/2⁠lb large post (100–120gsm); [17] greetings cards are usually 85⁠1/4⁠–106⁠3/4⁠lb double crown (200–250gsm); [18] newspaper paper is typically 15–23⁠1/2⁠lb double crown (35–55gsm); [19] business cards are usually 128–149⁠1/4⁠lb double crown (300–350gsm); [19] two‑ply toilet rolls and paper kitchen towels are 7⁠3/4⁠lb double crown (31gsm) [20] (both layers combined) and 17lb double crown (40gsm), [21] respectively; and the typical department‑store wrapping paper is commonly 46⁠1/2⁠–65lb double imperial (50–70gsm). [22]   In the traditional British system, large post, double crown, and double imperial are common British basis sizes for writing paper, printing paper and other paper that is not writing or wrapping paper, and wrapping paper, respectively.  ‘500’ is omitted because it is clear from the context that a ‘ream’ is 500 sheets.

Caliper

Paper thickness, or caliper, is a common measurement specified and required for certain printing applications. Since a paper's density is typically not directly known or specified, the thickness of any sheet of paper cannot be calculated by any method. Instead, it is measured and specified separately as its caliper. However, paper thickness for most typical business papers might be similar across comparable brands. If thickness is not specified for a paper in question, it must be either measured or guessed based on a comparable paper's specification.

Caliper is usually measured in micrometres (μm), or in the United States also in mils (1 mil = 1⁄1000 in = 25.4 μm). Commonly, 20-pound bond paper ranges between roughly 97 and 114 μm (0.0038 and 0.0045 in) in thickness. [23]

The paper density is calculated by dividing the grammage over the caliper, and is usually expressed in grams per cubic centimetre (g/cm3) [24] to cancel out the mathematical need for unit conversions between metres and micrometres (a conversion factor of 1,000,000).[ citation needed ]

See also

Notes

  1. 1 2 3 The pound per ream of demy paper has been chosen as the common unit for comparing the basis weights of paper in all three categories in this table, since there is a tradition of using demy as the default paper size for basis weight: in the British paper industry, there was a device, called ‘demy scale’, that was used to measure the weights of paper samples in pound per ream of demy paper (480‑sheet, 500‑sheet, and 516‑sheet reams).
  2. ↑ This formula and the previous formula are essentially the same, with the only difference being the inclusion of the numbers of sheets of paper in both the source ream and the target ream. Technically, the numbers of sheets of paper should also be included in the previous formula. However, since the numbers of sheets of paper in the two reams will be cancelled out if they are the same, they can be omitted in the previous formula.
  3. ↑ The pound per ream of demy paper has been chosen as the base unit because there is a tradition of using demy as the default paper size for basis weight: in the British paper industry, there was a device, called ‘demy scale’, that was used to measure the weights of paper samples in pound per ream of demy paper (480‑sheet, 500‑sheet, and 516‑sheet reams).
  4. ↑ The pound per 500‑sheet ream of demy paper has been chosen as the base unit for two reasons. Firstly, there is a tradition of using demy as the default paper size for basis weight: in the British paper industry, there was a device, called ‘demy scale’, that was used to measure the weights of paper samples in pound per ream of demy paper (480‑sheet, 500‑sheet, and 516‑sheet reams). Secondly, 500 sheets is both the modern standard definition of the ream and one of the traditional British basis‑ream sizes.

References

  1. ↑ International Standard ISO 536: Paper and board – Determination of grammage. International Organization for Standardization, Geneva.
  2. ↑ "ISO 536:2019". ISO. Retrieved 5 October 2022.
  3. ↑ Page 11, January, 1968 edition, Highlight
  4. ↑ Page 3, July, 1967 edition, Highlight
  5. ↑ Page 3, October, 1967 edition, Highlight
  6. ↑ Pages 136, 138, and 142, Paper and Its Uses (1919 edition)
  7. ↑ Pages 148, 150, and 171–173, Paper and Its Uses (1939 edition)
  8. ↑ Page 29, The Papermakers’ Pocket Book (1911)
  9. ↑ Page 168, Paper and Its Uses (1939 edition)
  10. 1 2 Pages 171–173, Paper and Its Uses (1939 edition)
  11. 1 2 Based on the basis weights mentioned in the paper‑related advertisements and articles in the following newspapers and paper‑industry magazines published during the days when the British paper industry exlcusively used basis weights:
  12. ↑ Pages 96 and 97, Paper and Its Uses (1919 edition)
  13. ↑ Page 368, November–December, 1894 edition, The British Printer
  14. ↑ Page 148, Paper and Its Uses (1919 edition)
  15. 1 2 Page 157, Paper and Its Uses (1939 edition)
  16. ↑ GSM Paper: the Complete Guide
  17. ↑ ‘What is GSM Paper Weight?’, Solopress Blog
  18. ↑ ‘Understanding the Different gsm Weights for Card and Paper Supplies’, Mankey Monkey
  19. 1 2 ‘Paper GSM Guide’, The Paperbox Limited
  20. ↑ For example, Kleenex toilet paper sold at https://www.galleonsupplies.co.uk/cheap-toilet-rolls-c10/bulk-pack-toilet-tissue-2-ply-p118.
  21. ↑ For example, the paper kitchen towel sold at https://www.amazon.co.uk/Pack-20-Centrefeed-Absorbent-Commercial/dp/B0CC6BS768.
  22. ↑ For example, the wrapping paper sold at https://www.transpack.co.uk/gift-display/coloured-kraft-wrapping-paper and https://www.makkipak.co.uk/product/kraft-paper-rolls-70gsm/.
  23. ↑ "Paper Comparisons". 22 October 2012. Archived from the original on 22 October 2012.
  24. ↑ "ISO 534:2011(en) Paper and board — Determination of thickness, density and specific volume".

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