Factor
(Hz) | Multiple | Value | Item |
|---|
| 10−18 | 1 attohertz (aHz) | ~2.2978 aHz | The Hubble constant (once in 13.8 billion years) |
| 10−17 | 10 aHz | ~79 aHz | Supercontinent cycle (about every 400 million years) |
| 10−16 | 100 aHz | ~137.8 aHz | Once per galactic year (about every 230 million years) |
| 10−15 | 1 femtohertz (fHz) | ~3 fHz | Sound waves created by a supermassive black hole in the Perseus Cluster [1] |
| 10−14 | 10 fHz | ~31.71 fHz | Once every one million years |
| 10−12 | 1 picohertz (pHz) | 1.23 pHz | Precession of the Earth's axis (about every 25,700 years) |
| 10−11 | 10 pHz | ~31.71 pHz | Once per millennium |
| 10−10 | 100 pHz | ~317.1 pHz | Once per century |
| 10−9 | 1 nanohertz (nHz) | ~1 nHz | Once per generation (about every 30 years) |
| ~2.9 nHz | Average solar cycle (about every 11 years) |
| ~3.171 nHz | Once per decade |
| 10−8 | 10 nHz | 11.6699016 nHz | Once in a blue moon [2] |
| ~31.71 nHz | Yearly (or Earth's orbital frequency) |
| 10−7 | 100 nHz | ~380.5 nHz | Monthly (or the Moon's orbital frequency) |
| ~413 nHz | Average menstrual cycle (28 days) |
| 10−6 | 1 microhertz (μHz) | ~1.653 μHz | Weekly |
| 10−5 | 10 μHz | ~11.57 μHz | Daily (or Earth's rotation frequency) |
| 10−4 | 100 μHz | ~277.8 μHz | Hourly |
| 10−2 | 1 centihertz (cHz) | ~16.667 mHz | One rpm |
| 10−1 | 1 decihertz (dHz) | 189 mHz | Acoustic – frequency of G−7, the lowest note sung by the singer with the deepest voice in the world, Tim Storms. His vocal cords vibrate 1 time every 5.29 seconds. |
| 100 | 1 hertz (Hz) | 1 to 1.66 Hz | Approximate frequency of an adult human's resting heart beat |
| 1 Hz | 60 bpm, common tempo in music |
| 2 Hz | 120 bpm, common tempo in music |
| ~7.83 Hz | Fundamental frequency of the Schumann resonances |
| 101 | 10 hertz | 10 Hz | Cyclic rate of a typical automobile engine at idle (equivalent to 600 rpm) |
| 12 Hz | Acoustic – the lowest possible frequency that a human can hear [3] |
| 18 Hz | Average house cat's purr |
| 24 Hz | Common frame rate of movies |
| 27.5 Hz | Acoustic – the lowest musical note (A0) playable on a normally-tuned standard piano |
| 50 Hz | Electromagnetic – standard AC mains power (European AC, Tokyo AC),
refresh rate of PAL and SECAM CRT televisions |
| 60 Hz | Electromagnetic – standard AC mains power (American AC, Osaka AC),
refresh rate of NTSC CRT televisions and standard refresh rate of computer monitors |
| 102 | 100 Hz | 100 Hz | Cyclic rate of a typical automobile engine at redline (equivalent to 6000 rpm) |
| 261.626 Hz | Acoustic – the musical note middle C (C4) |
| 440 Hz | Acoustic – concert pitch (A above middle C; A4), used for tuning musical instruments |
| 716 Hz | Rotational period of one of the fastest known millisecond pulsars, PSR J1748−2446ad [4] |
| 103 | 1 kilohertz (kHz) | 1 kHz | Usual frequency of a bleep censor |
| 4.186 kHz | Acoustic – the highest musical note (C8) playable on a normally-tuned standard piano |
| 8 kHz | ISDN sampling rate |
| 104 | 10 kHz | 14 kHz | Acoustic – the typical upper limit of adult human hearing |
| 17.4 kHz | Acoustic – a frequency known as the Mosquito, which is generally only audible to those under the age of 24. |
| 25.1 kHz | Acoustic – G10, the highest pitch sung by Georgia Brown, who has a vocal range of 8 octaves. |
| 44.1 kHz | Common audio sampling frequency |
| 105 | 100 kHz | 740 kHz | The clock speed of the world's first commercial microprocessor, the Intel 4004 (1971) |
| 106 | 1 megahertz (MHz) | 530 kHz to 1.710 MHz | Electromagnetic – AM radio broadcasts |
| 1 MHz to 8 MHz | Clock speeds of early home/personal computers (mid-1970s to mid-1980s) |
| 107 | 10 MHz | 13.56 MHz | Electromagnetic – near field communication |
| 108 | 100 MHz | 88 MHz to 108 MHz | Electromagnetic – FM radio broadcasts |
| 902 to 928 MHz | Electromagnetic – common cordless telephone frequency in the US |
| 109 | 1 gigahertz (GHz) | 1.42 GHz | Electromagnetic – the hyperfine transition of hydrogen, also known as the hydrogen line or 21 cm line |
| 2.4 GHz | Electromagnetic – microwave ovens, wireless LANs and cordless phones (starting in 1998) |
| 2.6–3.8 GHz | A common desktop CPU speed as of 2014 |
| 5.8 GHz | Electromagnetic – cordless telephone frequency introduced in 2003 |
| 1010 | 10 GHz | 3 GHz to 30 GHz | Electromagnetic – super high frequency |
| 60 GHz | Electromagnetic – 60 GHz Wi-Fi (WiGig) introduced in 2010 |
| 1011 | 100 GHz | 160.2 GHz | Electromagnetic – peak of cosmic microwave background radiation |
| 845 GHz | Fastest transistor (December 2006). [5] [6] |
| 1012 | 1 terahertz (THz) | | The terahertz gap |
| 1013 | 10 THz | 21 THz to 33 THz | Electromagnetic – infrared light used in thermal imaging, for example for night vision |
| 31.5 THz | Electromagnetic – peak of black-body radiation emitted by human body |
| 1014 | 100 THz | 400 THz to 790 THz | Electromagnetic – visible light, from red to violet |
| 1015 | 1 petahertz (PHz) | 2.47 PHz | Electromagnetic – Lyman-alpha line |
| 1016 | 10 PHz | 30 PHz | Electromagnetic – X-rays |
| 1017 | 100 PHz | | |
| 1018 | 1 exahertz (EHz) | | |
| 1019 | 10 EHz | | |
| 1020 | 100 EHz | 300 EHz + | Electromagnetic – gamma rays |
| 1021 | 1 zettahertz (ZHz) | 36 ZHz | Resonance width of the rho meson |
| 1024 | 1 yottahertz (YHz) | | |
| 1027 | 1 ronnahertz (RHz) | 3.9 RHz | Highest energy (16 TeV) gamma ray detected, from Markarian 501 |
| 1030 | 1 quettahertz (QHz) | | |
| 1043 | 10 trillion QHz | 18.5 trillion QHz | The unit of inverse time (or frequency) in the system of Planck units |
