How it's calculated
kcal = MET × weight(kg) × time(hours)
MET = metabolic equivalent for the stroke and intensity (moderate freestyle ≈ 8.3), weight in kilograms, time in hours. Energy in kJ = kcal × 4.184.
Reference ranges
| Stroke | MET (vigorous) |
|---|---|
| Freestyle, fast | 10.0 |
| Breaststroke | 10.3 |
| Butterfly | 13.8 |
| Water aerobics | 5.5 |
Common questions
How many calories does swimming burn?
A 160 lb person swimming fast freestyle for 30 minutes burns roughly 360 calories.
Which stroke burns the most?
Butterfly is the most demanding, with the highest MET value, followed by fast freestyle and breaststroke.