The M Countdown Chart is a record chart on the South Korean Mnet television music program M Countdown . Every week, the show awards the best-performing single on the chart in the country during its live broadcast.
In 2018, 35 singles ranked number one on the chart and 21 music acts were awarded first-place trophies. Two songs collected trophies for three weeks and achieved a triple crown: "Love Scenario" by iKon, and "Ddu-Du Ddu-Du" by Blackpink. Of all releases for the year, only two songs earned a perfect score of 11,000 points: "Fake Love" by BTS and "I Want You" by Shinee.
Scoring System: Digital Music Sales (50%), Album Sales (15%), Social Media Score (YouTube official music video views + SNS buzz) (15%), Popularity Score (global fan votes + age range preference) (10%), Mnet Broadcast Score (10%) + SMS Voting Score (10%).
Scoring System: Digital Music Sales (45%), Album Sales (15%), Social Media Score (YouTube official music video views + SNS buzz) (20%), Global Fan Votes (10%), Mnet Broadcast Score (10%), SMS Live Vote 10%.
| Triple Crown | |
| Highest score of the year | |
| — | No show was held |
| Episode | Date | Artist | Song | Points | Ref. |
|---|---|---|---|---|---|
| — | January 4 | No Broadcast or Winner | [1] | ||
| 553 | January 11 | Momoland | "Bboom Bboom" | 7,811 | [2] |
| 554 | January 18 | Infinite | "Tell Me" | 10,554 | [3] |
| 555 | January 25 | Sunmi | "Heroine" | 7,919 | [4] [5] |
| 556 | February 1 | iKon | "Love Scenario" | 7,789 | [6] |
| 557 | February 8 | Red Velvet | "Bad Boy" | 10,032 | [7] |
| 558 | February 15 | — | [8] | ||
| 559 | February 22 | Momoland | "Bboom Bboom" | 8,834 | [9] |
| 560 | March 1 | iKon | "Love Scenario" | 8,467 | [10] |
| 561 | March 8 | 8,001 | [11] | ||
| 562 | March 15 | Mamamoo | "Starry Night" | 9,820 | [12] |
| 563 | March 22 | 7,938 | [13] | ||
| 564 | March 29 | Wanna One | "Boomerang" | 10,805 | [14] |
| 565 | April 5 | 9,981 | [15] | ||
| 566 | April 12 | Winner | "Everyday" | 9,687 | [16] |
| 567 | April 19 | Twice | "What Is Love?" | — | [17] |
| 568 | April 26 | 9,360 | [18] | ||
| 569 | May 3 | Winner | "Everyday" | 7,463 | [19] |
| 570 | May 10 | GFriend | "Time for the Moon Night" | 10,700 | [20] |
| — | May 17 | No Broadcast or Winner | [21] | ||
| 571 | May 24 | (G)I-dle | "Latata" | 8,183 | [22] |
| 572 | May 31 | BTS | "Fake Love" | 11,000 | [23] |
| 573 | June 7 | 9,666 | [24] | ||
| 574 | June 14 | Wanna One | "Light" | 10,320 | [25] |
| 575 | June 21 | Shinee | "I Want You" | 11,000 | [26] |
| 576 | June 28 | Blackpink | "Ddu-Du Ddu-Du" | 8,706 | [27] |
| 577 | July 5 | — | [28] | ||
| 578 | July 12 | [29] | |||
| 579 | July 19 | Twice | "Dance the Night Away" | 10,933 | [30] |
| 580 | July 26 | Seventeen | "Oh My!" | 8,546 | [31] |
| 581 | August 2 | Mamamoo | "Egotistic" | 7,731 | [32] |
| 582 | August 9 | iKon | "Killing Me" | 7,888 | [33] |
| — | August 16 | M Countdown No.1 Special | [34] [35] | ||
| 583 | August 23 | Red Velvet | "Power Up" | 8,761 | [36] |
| 584 | August 24 | KCON 2018 LA x M COUNTDOWN, No Winner | [34] | ||
| 585 | August 30 | Red Velvet | "Power Up" | 8,444 | [37] |
| 586 | September 6 | (G)I-dle | "Hann" | 7,213 | [38] |
| 587 | September 13 | Sunmi | "Siren" | 7,624 | [39] [40] |
| 588 | September 20 | 7,381 | [41] | ||
| 589 | September 27 | Got7 | "Lullaby" | — | [42] |
| 590 | October 4 | 10,595 | [43] | ||
| 591 | October 11 | iKon | "Goodbye Road" | — | [44] |
| 592 | October 18 | 8,286 | [45] | ||
| 593 | October 25 | NCT 127 | "Regular" | 10,000 | [46] |
| 594 | November 1 | Monsta X | "Shoot Out" | 6,349 | [47] |
| 595 | November 8 | Iz*One | "La Vie en Rose" | 10,884 | [48] |
| 596 | November 15 | Twice | "Yes or Yes" | 8,695 | [49] [50] |
| — | November 22 | Special Broadcast of Wanna One Comeback Show | [51] | ||
| 597 | November 29 | Wanna One | "Spring Breeze" | — | [52] |
| 598 | December 6 | Mino | "Fiancé" | [53] | |
| — | December 13 | Special Edition (KCON Japan 2018) | [54] | ||
| — | December 20 | [55] | |||
| 599 | December 27 | Winner | "Millions" | — | [56] |