| Event: | Women's 400 metre freestyle |
| Competition: | 2018 FINA World Swimming Championships (25 m) |
| Venue: | Hangzhou Sports Park Stadium |
| Dates: | 14 December (heats and final) |
| Competitors: | 41 |
| Nations: | 34 |
| Win Value: | 3:53.92 |
| Gold: | Ariarne Titmus |
| Goldnoc: | AUS |
| Silver: | Wang Jianjiahe |
| Silvernoc: | CHN |
| Bronze: | Li Bingjie |
| Bronzenoc: | CHN |
| Prev: | 2016 |
| Next: | 2021 |
The women's 400 metre freestyle competition of the 2018 FINA World Swimming Championships (25 m) was held on 14 December 2018.[1]
Prior to the competition, the existing world and championship records were as follows.
| Name | Nation | Time | Location | Date | ||
|---|---|---|---|---|---|---|
| World record | Wang Jianjiahe | 3:53.97 | Budapest | 4 October 2018 | ||
| Championship record | Mireia Belmonte | 3:55.76 | Doha | 5 December 2014 |
The following new records were set during this competition:
The heats were started at 10:15.[2]
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|---|
| 1 | 4 | 3 | 3:58.58 | Q | ||
| 2 | 4 | 5 | 4:00.46 | Q | ||
| 3 | 5 | 4 | 4:00.73 | Q | ||
| 4 | 5 | 6 | 4:01.82 | Q | ||
| 5 | 5 | 5 | 4:02.31 | Q | ||
| 6 | 5 | 3 | 4:02.79 | Q | ||
| 7 | 4 | 6 | 4:03.37 | Q | ||
| 8 | 4 | 0 | 4:04.51 | Q | ||
| 9 | 5 | 7 | 4:04.94 | |||
| 10 | 4 | 2 | 4:05.00 | |||
| 11 | 4 | 1 | 4:05.65 | |||
| 12 | 4 | 9 | 4:05.89 | |||
| 13 | 4 | 8 | 4:06.05 | |||
| 14 | 5 | 2 | 4:06.21 | |||
| 15 | 4 | 7 | 4:06.81 | |||
| 16 | 5 | 1 | 4:06.95 | |||
| 17 | 5 | 9 | 4:09.55 | |||
| 18 | 3 | 6 | 4:09.90 | NR | ||
| 19 | 3 | 3 | 4:09.94 | |||
| 20 | 3 | 5 | 4:10.70 | |||
| 21 | 3 | 8 | 4:11.11 | NR | ||
| 22 | 5 | 0 | 4:11.40 | |||
| 23 | 3 | 4 | 4:12.50 | |||
| 24 | 5 | 8 | 4:13.69 | |||
| 25 | 3 | 1 | 4:14.78 | |||
| 26 | 3 | 2 | 4:15.61 | |||
| 27 | 1 | 5 | 4:16.49 | |||
| 28 | 2 | 5 | 4:17.93 | |||
| 29 | 2 | 4 | 4:18.03 | NR | ||
| 30 | 3 | 7 | 4:18.20 | |||
| 31 | 3 | 0 | 4:20.12 | |||
| 32 | 2 | 6 | 4:26.56 | |||
| 33 | 2 | 2 | 4:28.23 | NR | ||
| 34 | 2 | 0 | 4:32.85 | |||
| 35 | 2 | 3 | 4:34.70 | |||
| 36 | 2 | 7 | 4:35.11 | NR | ||
| 37 | 1 | 4 | 4:39.58 | |||
| 38 | 2 | 1 | 4:40.44 | |||
| 39 | 1 | 3 | 4:46.08 | |||
| 40 | 2 | 9 | 4:55.92 | |||
| 41 | 2 | 8 | 4:56.24 | |||
| 3 | 9 | |||||
| 4 | 4 |
The final was held at 19:48.[3]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | 3:53.92 | |||||
| 3 | 3:54.56 | |||||
| 6 | 3:57.99 | |||||
| 4 | 5 | 3:58.58 | ||||
| 5 | 2 | 4:01.52 | ||||
| 6 | 8 | 4:02.87 | ||||
| 7 | 7 | 4:03.28 | ||||
| 8 | 1 | 4:03.61 |