Estimate calories burned while swimming based on stroke, intensity, body weight and session length. Compare freestyle, backstroke, breaststroke, butterfly and water walking.
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Swimming is one of the most complete conditioning activities because water resistance forces the whole body to work at once. That usually leads to high energy expenditure, especially when pace and technical demand go up.
| Stroke | MET | kcal/h (154 lb / 70 kg) |
|---|---|---|
| Easy freestyle | 6.0 | 420 |
| Moderate freestyle | 8.3 | 581 |
| Breaststroke | 7.0 | 490 |
| Backstroke | 6.0 | 420 |
| Butterfly | 13.8 | 966 |
Swimming combines high calorie burn with low joint impact, which makes it attractive for beginners, heavier athletes and people who need a break from repetitive land-based cardio.
It also trains the upper and lower body together. That full-body demand is one of the reasons why hard swimming sessions can burn as many calories as many running workouts.