2021 FINA World Swimming Championships (25 m) – Women's 400 metre individual medley explained

Event:	Women's 400 metre individual medley
Competition:	2021 FINA World Swimming Championships (25 m)
Venue:	Etihad Arena
Location:	Abu Dhabi, United Arab Emirates
Dates:	16 December (heats and final)
Competitors:	32
Nations:	27
Win Value:	4:25.55
Gold:	Tessa Cieplucha
Goldnoc:	CAN
Silver:	Ellen Walshe
Silvernoc:	IRL
Bronze:	Melanie Margalis
Bronzenoc:	USA
Prev:	2018
Next:	2022

The Women's 400 metre individual medley competition of the 2021 FINA World Swimming Championships (25 m) was held on 16 December 2021.^[1]

Records

Prior to the competition, the existing world and championship records were as follows.

The heats were started at 11:10.^[2]

Rank	Heat	Lane	Time	Notes
1	4	3	4:30.27	Q
2	4	5	4:30.62	Q
3	4	4	4:30.75	Q
4	3	9	4:30.78	Q
5	3	4	4:31.08	Q
6	3	5	4:32.02	Q
7	3	3	4:32.75	Q
8	3	6	4:32.97	Q
9	3	0	4:33.29
10	2	4	4:33.30
11	3	2	4:34.42
12	4	1	4:35.69
13	4	7	4:35.74
14	4	8	4:36.22
15	4	2	4:37.75
16	4	6	4:38.49
17	3	8	4:39.53
18	4	0	4:39.77
19	2	3	4:39.88
20	3	7	4:39.90
21	3	1	4:40.39
22	1	4	4:41.84	NR
23	2	5	4:42.18
24	4	9	4:42.64
25	2	6	4:44.53
26	2	1	4:46.31
27	2	9	4:47.42
28	2	2	4:47.99
29	2	0	4:50.91
30	1	5	5:00.25
31	1	6	5:08.94
32	1	3	5:13.46
	2	7	DNS
	2	8	DNS

The final was held at 18:49.^[3]