Women’s 400m Individual Medley – Long Course World Record & Splits

Updated June 2025

Current Records

Record	Athlete	Time
World Record	Summer McIntosh	4:23.65
Olympic Record	Katinka Hosszú	4:26.36
World Junior Record	Summer McIntosh	4:25.87
Commonwealth Record	Summer McIntosh	4:23.65

Top 10 All-Time Performers

#	Athlete	Fly	Back	Breast	Free	Total
1	Summer McIntosh	59.18	1:06.13	1:18.02	1:00.32	4:23.65
2	Katinka Hosszú	1:00.91	1:07.48	1:16.11	1:01.86	4:26.36
3	Kaylee McKeown	1:01.68	1:08.31	1:16.17	1:02.06	4:28.22
4	Ye Shiwen	1:02.19	1:09.54	1:18.02	58.68	4:28.43
5	Stephanie Rice	1:01.47	1:08.36	1:17.42	1:02.20	4:29.45
6	Kirsty Coventry	1:02.75	1:06.75	1:18.96	1:01.43	4:29.89
7	Li Xuanxu	—	—	—	—	4:30.43
8	Yui Ohashi	1:01.26	1:09.42	1:17.74	1:02.81	4:30.82
9	Qi Hui	—	—	—	—	4:30.85
10	Katie Hoff	1:03.69	1:09.64	1:15.32	1:02.47	4:31.12

Split Analysis & Comparison

The table below compares elite 400m individual medley long-course performances.
Use it to review stroke 100s, stroke counts, and race patterns. Data is collected from official results and race footage where available.

Women’s 400 IM – Long Course
	Summer McIntosh	Katinka Hosszu	Kaylee McKeown	Shiwen Ye	Stephanie Rice	Kirsty Coventry	Yui Ohashi	Katie Hoff
Height:	5 ft 8 in 173cm	5 ft 9 in 175cm	5 ft 9 in 175cm	5 ft 8 in 172cm	5 ft 9 in 176cm	5 ft 9 in 176cm	5 ft 8 in 173cm	5 ft 9 in 175cm
Weight:		150 Ib 68kg	132 Ib 60kg	141 Ib 64kg	148 Ib 67kg	141Ib 64kg	125 Ib 57kg	141 Ib 64kg
Country:	CAN	HUN	AUS	CHN	AUS	ZIM	JPN	USA
DOB:	2006-08-18	1989-05-03	2001-07-11	1996-03-01	1988-06-17	1983-09-16	1995-10-18	1989-06-03
Meet:	2025 Bell Canadian Swimming Trials	Olympic Games Rio 2016	2024 Australian Open Championships	Olympic Games London 2012	Olympic Games Beijing 2008	Olympic Games Beijing 2008	Japan Swim 2018	USA Olympic Trails 2008

1st 50m Split	27.75	28.33	28.57	28.85	28.66	29.50	28.41	30.10
Strokes	20	20		20				23
Split Time:	27.55	28.33	28.57	28.85	28.66	29.50	28.41	30.10
50m PB:	26.74	26.62	27.84	27.54	28.54	27.95	26.59	28.52
Time off 50m PB:	0.31	1.71	0.73	1.31	0.12	1.55	1.82	1.58
Percentage of 50m PB:	101.064%	106.424%	102.622%	104.757%	100.420%	105.546%	106.844%	105.540%

2nd 50m Split	31.43	32.58	33.11	33.34	32.81	33.25	32.85	33.59
Strokes	24	23		23				25
Split Time:	59.18	1:00.91	1:01.68	1:02.19	1:01.47	1:02.75	1:00.76	1:03.69

3rd 50m Split	33.18	34.10	35.13	35.34	34.70	33.57	35.04	35.47
Strokes	39	42		41				37
Split Time:	1:32.36	1:35.01	1:36.81	1:37.53	1:36.17	1:36.32	1:35.80	1:39.16

4th 50m Split	32.95	33.38	33.18	34.20	33.66	33.18	34.38	34.17
Strokes	38	43		37				37
Split Time:	2:05.31	2:08.29	2:09.99	2:11.73	2:09.83	2:09.50	2:10.18	2:13.33

5th 50m Split	38.36	37.23	39.10	38.80	38.29	38.74	38.83	37.45
Strokes	22	23		20				26
Split Time:	2:43.67	2:45.62	2:49.09	2:50.53	2:48.12	2:48.24	2:49.10	2:50.78

6th 50m Split	39.66	38.88	39.10	39.22	39.13	40.22	38.91	37.87
Strokes	23	23		21				26
Split Time:	3:23.33	3:24.50	3:26.16	3:29.75	3:27.25	3:28.46	3:28.01	3:28.65

7th 50m Split	30.95	31.18	31.89	29.75	31.67	31.33	32.11	31.01
Strokes	40	39		42				42
Split Time:	3:54.28	3:55.68	3:58.05	3:59.50	3:58.92	3:59.79	4:00.12	3:59.66

8th 50m Split	29.37	30.68	30.17	28.93	30.53	30.10	30.70	31.46
Strokes	42	41		43				43

Total Time:	4:23.65	4:26.36	4:28.22	4:28.43	4:29.45	4:29.89	4:30.82	4:31.12

Race Videos

Summer McIntosh – 4:23.65 World Record

Swim Calculators

Tool	What it does
Swim Pace Calculator	Pace, time, and distance (min/100m or min/100yds).
Goal Time / Split Calculator	Target splits for metres racing.
Yards Goal Calculator	Target splits for yards racing.
Race Review Calculator	Find strengths and weaknesses in a completed race.
Medley Relay Calculator	Build the fastest relay order from up to 6 swimmers’ PBs.