Women’s 400m Freestyle – Short Course World Record & Splits
World record history, all-time fastest performers, race splits, and technical comparisons
for the women’s 400m freestyle in a 25m pool (SCM).
Updated September 2026
Current Records
| Record | Swimmer | Nation | Time | Meet / Date |
|---|---|---|---|---|
| World Record | Summer McIntosh | Canada | 3:50.25 | World Aquatics Swimming Championships (25m), Budapest · 10 Dec 2024 |
| World Junior Record | Summer McIntosh | Canada | 3:50.25 | World Aquatics Swimming Championships (25m), Budapest · 10 Dec 2024 |
| Commonwealth Record | Summer McIntosh | Canada | 3:50.25 | World Aquatics Swimming Championships (25m), Budapest · 10 Dec 2024 |
Top 10 All-Time Performers
| Rank | Swimmer | 50m Splits | Time |
|---|---|---|---|
| 1 | Summer McIntosh | — | 3:50.25 |
| 2 | Li Bingjie | 27.41 / 29.31 / 29.55 / 29.61 / 29.39 / 29.25 / 29.00 / 27.78 | 3:51.30 |
| 3 | Lani Pallister | 26.96 / 28.79 / 29.07 / 29.28 / 29.34 / 29.78 / 29.89 / 28.76 | 3:51.87 |
| 4 | Katie Ledecky | 27.20 / 28.95 / 29.26 / 29.40 / 29.58 / 29.94 / 29.38 / 29.17 | 3:52.88 |
| 5 | Ariarne Titmus | 26.93 / 29.15 / 29.38 / 29.91 / 29.84 / 29.73 / 29.70 / 29.28 | 3:53.92 |
| 6 | Wang Jianjiahe | 27.00 / 29.03 / 29.67 / 29.75 / 30.05 / 30.21 / 30.10 / 28.16 | 3:53.97 |
| 7 | Isabel Gose | — | 3:54.33 |
| 8 | Mireia Belmonte | 27.82 / 29.52 / 29.81 / 29.91 / 29.63 / 29.77 / 29.35 / 28.71 | 3:54.52 |
| 9 | Camille Muffat | 26.84 / 29.40 / 29.67 / 30.04 / 29.99 / 30.07 / 29.71 / 29.13 | 3:54.85 |
| 10 | Mary-Sophie Harvey | — | 3:54.88 |
Related Freestyle Analysis
Race Videos
Top Swim Calculators
| Calculator | What it does |
|---|---|
| Swim Pace Calculator | Calculate pace, time, or distance for meters and yards. |
| Goal Time Calculator | Turn a target meter-race time into goal splits. |
| Yards Goal Calculator | Build goal splits for short-course yards racing. |
| Swim Time Converter | Convert times between SCY, SCM, and LCM using stroke-specific adjustments. |
| World Aquatics Points Calculator | Calculate World Aquatics points from an LCM or SCM time, or find a target time for a point score. |
| Race Review Calculator | Review race splits and identify pacing strengths and opportunities. |
| Medley Relay Calculator | Find the fastest medley relay order from up to six swimmers’ best times. |
| Critical Swim Speed (CSS) Calculator | Estimate threshold pace for aerobic and endurance training. |
| Average Speed Calculator | Calculate average speed from a distance and time. |