Final
dimanche 23 mai 2021, 17h11 GMT – 17h11 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Duncan Scott | Great Britain | 3′ 28.59″ |
| 1 | James Guy | Great Britain | + 0″ |
| 1 | Luke Greenbank | Great Britain | + 0″ |
| 1 | Adam Peaty | Great Britain | + 0″ |
| 2 | Kliment Kolesnikov | Russia | + 0.91″ |
| 2 | Kirill Prigoda | Russia | + 0.91″ |
| 2 | Mikhail Vekovishchev | Russia | + 0.91″ |
| 2 | Andrey Minakov | Russia | + 0.91″ |
| 3 |  Nicolò Martinenghi | Italy | + 1.34″ |
| 3 | Alessandro Miressi | Italy | + 1.34″ |
| 3 | Thomas Ceccon | Italy | + 1.34″ |
| 3 | Federico Burdisso | Italy | + 1.34″ |
| 4 |  Kacper Stokowski | Poland | + 4.23″ |
| 4 | Jakub Kraska | Poland | + 4.23″ |
| 4 | Jakub Majerski | Poland | + 4.23″ |
| 4 | Jan Kozakiewicz | Poland | + 4.23″ |
| 5 |  Mehdy Metella | France | + 4.51″ |
| 5 | Maxime Grousset | France | + 4.51″ |
| 5 |  Théo Bussière | France | + 4.51″ |
| 5 | Yohann Ndoye Brouard | France | + 4.51″ |
| 6 | Artsiom Machekin | Belarus | + 5.61″ |
| 6 |  Yauhen Tsurkin | Belarus | + 5.61″ |
| 6 | Viktar Staselovich | Belarus | + 5.61″ |
| 6 | Ilya Shymanovich | Belarus | + 5.61″ |
| 7 |  Shane Ryan | Ireland | + 6.29″ |
| 7 | Brendan Hyland | Ireland | + 6.29″ |
| 7 | Darragh Greene | Ireland | + 6.29″ |
| 7 | Jack McMillan | Ireland | + 6.29″ |
| 8 | Ramon Klenz | Germany | + 6.68″ |
| 8 | Björn Kammann | Germany | + 6.68″ |
| 8 | Lucas Matzerath | Germany | + 6.68″ |
| 8 | Josha Salchow | Germany | + 6.68″ |