Women’s 100m Backstroke – Long Course World Record & Splits

Current Records:

World Record: Regan Smith 57.13
Olympic Record: Regan Smith 57.28 (4 x 100 Medley Relay)
World Junior Record: Regan Smith 57.57
Commonwealth Record: Kaylee McKeown 57.33

Top 10 All-time Performers:

1. Regan Smith (27.94, 29.19) 57.13
2. Kaylee McKeown (28.15, 29.18) 57.33
3. Kylie Masse (28.07, 29.63) 57.70
4. Mollie O’Callaghan (28.17, 29.71) 57.88
5. Katharine Berkoff (28.05, 29.93) 57.98
6. Kathleen Baker (27.90, 30.10) 58.00
7. Kathleen Dawson (28.23, 29.85) 58.08
8. Gemma Spofforth (28.71, 29.41) 58.12
9. Anastasia Zueva (28.13, 30.05) 58.18
10. Emily Seebohm (28.57,29.66) 58.23
11. Claire Curzan (28.25, 30.04) 58.29

Data Analysis and Comparison:

The chart below compares the World’s Fastest 100m Backstroke – Women’s Long Course swimmers. Swimmers and coaches can looks at the individual Splits, Stroke Counts and the first 50m split compared to swimmers 50m PB. All swim data has been collected from our team reviewing race footage where possible.

Woman's 100m Backstroke Long Course

Women's 100m Backstroke - Long Course
	Regan Smith	Kaylee McKeown	Kylie Masse	Mollie O'Callaghan	Katharine Berkoff	Kathleen Baker	Kathleen Dawson	Gemma Spofforth	Anastasia Zueva	Emily Seebohm	Claire Curzan
Height:	5ft 7in 1.70m	5ft 9in 1.75m	5ft 8in 1.72m	5ft 8in 1.73m		5ft 8in 1.73m	5ft 8in 1.72m	6ft 1in 1.86m	6ft 1.83m	6ft 1.83m
Weight:	121lb 55kg	132lb 60kg	134lb 61kg	130lb 59kg		149lb 68kg	141lb 64kg	161lb 73kg	154lb 70kg	141lb 64kg
Country:	USA	AUS	Canada	AUS	USA	USA	Great Britian	Great Britian	Russia	AUS	USA
DOB:	2002-02-09	2001-07-12	1996-01-18	2004-04-02	2001-01-28	1997-02-28	1997-10-03	1987-11-17	1990-05-08	1992-06-05	2004-06-30
Meet:	2024 U.S. Olympic Trials	Swimming World Cup - Budapest Oct 2023	Canadian Olympic Trials 2021	2024 Australian Swimming Trials	Olympic Games Paris 2024	2018 USA Summer Nationals	2021 European Championships	13th FINA World Championships 2009	13th FINA World Championships 2009	Olympic Games London 2012	World Aquatics Championships Doha 2024
1st 50m Split
Strokes	35	35	35			35	33	32	34	33
Split Time:	27.94	28.15	28.07	28.17	28.05	27.90	28.23	28.71	28.13	28.57	28.25
50m PB:	27.74	26.86	27.64	28.17	27.12	27.48	27.92	27.92	27.90	27.37	28.09
Time off 50m PB:	0.20	1.29	0.43	0.00	0.93	0.42	0.31	0.79	0.23	1.20	0.16
Percentage of 50m PB:	100.721%	104.803%	101.556%	100.000%	103.429%	101.528%	101.110%	102.830%	100.824%	104.384%	100.570%
2nd 50m Split
Strokes	38	37	38			42	37	37	40	38
Split Time:	29.19	29.18	29.63	29.71	29.93	30.10	29.85	29.41	30.05	29.66	30.04
Total Time:	57.13	57.33	57.70	57.88	57.98	58.00	58.08	58.12	58.18	58.23	58.29

Watch Regan Smith’s New World Record swim

Here is Emma McKeown’s Previous 100m Backstroke World Record swim to view.

Here is a look at the Women’s 200m Backstroke Long Course All Time Rankings.

Note: Women’s 100m Backstroke – Long Course World Record & Splits – Update July 2024

Our Top 5 Swim Calculators:

1. Swim Pace Calculator – Help you determine your pace, time, and distance based on your goals and performances. Optional settings for MIN/100YDS and MIN/100M
2. Swim Split Calculator/Goal Time Calculator – Breaks the swim down to the individual target splits for Meters racing
3. Yards Goal Calculator – Breaks the swim down to the individual target splits for Yards racing
4. Race Review Calculator – Allows the coach, swimmer or parent to identify the strengths and weaknesses of a race that has been swum.
5. Medley Relay Calculator – This Calculator allows coaches to quickly compose the fastest relay team available to them. Enter up to 6 swimmers, enter their personal bests for each event and then hit calculate. The Medley Relay Calculator will then provide you with the fastest relay combination available to you.

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