| Event: | Men's 400 metre freestyle |
| Competition: | 2018 FINA World Swimming Championships (25 m) |
| Venue: | Hangzhou Sports Park Stadium |
| Dates: | 11 December (heats and final) |
| Competitors: | 41 |
| Nations: | 37 |
| Win Value: | 3:34.01 |
| Gold: | Danas Rapšys |
| Goldnoc: | LTU |
| Silver: | Henrik Christiansen |
| Silvernoc: | NOR |
| Bronze: | Gabriele Detti |
| Bronzenoc: | ITA |
| Prev: | 2016 |
| Next: | 2021 |
The Men's 400 metre freestyle competition of the 2018 FINA World Swimming Championships (25 m) were held on 11 December 2018.[1]
Prior to the competition, the existing world and championship records were as follows.
| Name | Nation | Time | Location | Date | ||
|---|---|---|---|---|---|---|
| World record | Yannick Agnel | 3:32.25 | Angers | 15 November 2012 | ||
| Championship record | Péter Bernek | 3:34.32 | Doha | 5 December 2014 |
The following records were established during the competition:
The heats were started at 09:30.[2]
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | 3 | 4 | 3:36.65 | Q, NR | |||
| 2 | 4 | 5 | 3:38.04 | Q | |||
| 3 | 4 | 6 | 3:39.10 | Q, SA | |||
| 4 | 5 | 9 | 3:39.73 | Q | |||
| 5 | 5 | 4 | 3:39.86 | Q | |||
| 5 | 5 | Q | |||||
| 7 | 5 | 3 | 3:39.89 | Q | |||
| 8 | 4 | 2 | 3:40.36 | Q | |||
| 9 | 4 | 3 | 3:40.47 | ||||
| 10 | 5 | 6 | 3:42.27 | ||||
| 11 | 4 | 7 | 3:42.31 | ||||
| 12 | 5 | 8 | 3:42.62 | ||||
| 13 | 3 | 2 | 3:42.74 | NR | |||
| 14 | 4 | 9 | 3:43.26 | NR | |||
| 15 | 4 | 4 | 3:43.74 | ||||
| 16 | 5 | 7 | 3:44.16 | ||||
| 17 | 5 | 1 | 3:44.79 | ||||
| 18 | 4 | 0 | 3:45.22 | ||||
| 19 | 3 | 8 | 3:45.98 | ||||
| 20 | 2 | 5 | 3:46.05 | NR | |||
| 21 | 3 | 0 | 3:46.13 | ||||
| 22 | 2 | 4 | 3:46.14 | NR | |||
| 23 | 5 | 0 | 3:46.65 | ||||
| 24 | 4 | 8 | 3:46.96 | ||||
| 25 | 3 | 1 | 3:46.97 | ||||
| 26 | 3 | 5 | 3:47.71 | ||||
| 27 | 4 | 1 | 3:47.84 | ||||
| 28 | 3 | 9 | 3:48.76 | NR | |||
| 29 | 5 | 2 | 3:50.58 | ||||
| 30 | 2 | 3 | 3:51.86 | ||||
| 31 | 3 | 3 | 3:53.25 | ||||
| 32 | 3 | 7 | 3:55.67 | ||||
| 33 | 3 | 6 | 3:56.14 | ||||
| 34 | 1 | 5 | 4:00.66 | ||||
| 35 | 2 | 2 | 4:00.92 | NR | |||
| 36 | 2 | 1 | 4:04.28 | ||||
| 37 | 2 | 7 | 4:05.12 | ||||
| 38 | 1 | 3 | 4:05.76 | NR | |||
| 39 | 2 | 8 | 4:06.92 | ||||
| 40 | 2 | 6 | 4:06.94 | ||||
| 41 | 1 | 4 | 4:37.35 |
The final was held at 19:00.[3]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | 3:34.01 | CR, NR | ||||
| 5 | 3:36.64 | NR | ||||
| 1 | 3:37.54 | |||||
| 4 | 7 | 3:37.75 | ||||
| 5 | 2 | 3:37.97 | ||||
| 6 | 6 | 3:38.99 | ||||
| 7 | 8 | 3:39.22 | ||||
| 8 | 3 | 3:39.40 |