2012 FINA World Swimming Championships (25 m) – Men's 400 metre individual medley
The men's 400 metre individual medley event at the 11th FINA World Swimming Championships took place 13 December 2012 at the Sinan Erdem Dome.
Records
Prior to this competition, the existing world and championship records were as follows.| Name | Nation | Time | Location | Date | |
| World record Championship record | Ryan Lochte | 3:55.50 | Dubai | 16 December 2010 |
No new records were set during this competition.
Results
Heats
43 swimmers participated in 5 heats.| Rank | Heat | Lane | Name | Time | Notes |
| 1 | 5 | 4 | 4:04.28 | Q | |
| 2 | 4 | 4 | 4:04.61 | Q | |
| 3 | 4 | 5 | 4:05.99 | Q | |
| 4 | 3 | 4 | 4:06.64 | Q | |
| 5 | 4 | 3 | 4:07.42 | Q | |
| 6 | 5 | 5 | 4:07.78 | Q | |
| 7 | 3 | 5 | 4:08.38 | Q | |
| 8 | 5 | 1 | 4:08.46 | Q | |
| 9 | 3 | 3 | 4:09.59 | ||
| 10 | 4 | 0 | 4:09.76 | ||
| 11 | 4 | 6 | 4:10.18 | ||
| 12 | 5 | 9 | 4:10.38 | ||
| 13 | 4 | 1 | 4:11.08 | ||
| 14 | 5 | 2 | 4:11.17 | ||
| 15 | 4 | 2 | 4:11.60 | ||
| 16 | 3 | 6 | 4:12.36 | ||
| 17 | 5 | 6 | 4:12.70 | ||
| 18 | 3 | 1 | 4:13.75 | ||
| 19 | 5 | 8 | 4:14.42 | ||
| 20 | 3 | 9 | 4:14.44 | ||
| 21 | 3 | 2 | 4:14.60 | ||
| 22 | 5 | 3 | 4:14.89 | ||
| 23 | 4 | 7 | 4:15.52 | ||
| 24 | 4 | 8 | 4:15.55 | ||
| 25 | 5 | 7 | 4:16.20 | ||
| 26 | 3 | 8 | 4:17.68 | ||
| 27 | 3 | 7 | 4:18.17 | ||
| 28 | 2 | 3 | 4:18.54 | NR | |
| 29 | 2 | 5 | 4:22.01 | NR | |
| 30 | 3 | 0 | 4:23.98 | ||
| 31 | 2 | 6 | 4:24.62 | ||
| 32 | 1 | 6 | 4:26.13 | NR | |
| 33 | 2 | 2 | 4:26.32 | ||
| 34 | 4 | 9 | 4:26.70 | ||
| 35 | 2 | 1 | 4:28.05 | ||
| 36 | 5 | 0 | 4:29.28 | ||
| 37 | 2 | 7 | 4:30.70 | ||
| 38 | 1 | 5 | 4:32.10 | ||
| 39 | 2 | 8 | 4:35.81 | ||
| 40 | 2 | 0 | 4:39.80 | ||
| 41 | 2 | 9 | 4:54.29 | ||
| 1 | 4 | ||||
| 2 | 4 | ||||
| 1 | 3 |
Final
The final was held at 19:10.| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Daiya Seto | JPN | 3:59.15 | AS | |
| 5 | László Cseh | HUN | 4:00.50 | ||
| 6 | Dávid Verrasztó | HUN | 4:02.87 | ||
| 4 | 7 | Kosuke Hagino | JPN | 4:04.13 | |
| 5 | 3 | Gal Nevo | ISR | 4:04.29 | NR |
| 6 | 1 | Chris Christensen | DEN | 4:06.81 | |
| 7 | 8 | Michael Weiss | USA | 4:07.67 | |
| 8 | 2 | Diogo Carvalho | POR | 4:09.95 |