Calories Burned Swimming Calculator
Estimate how many calories you burn swimming. Enter your body weight, the stroke and intensity, and how long you swam, and this calculator returns the calories burned and your burn rate per minute using MET values.
Formula
Calories = MET × weight (kg) × time (hours)
- MET (Metabolic Equivalent of Task) rates how intense swimming is compared with resting (1 MET).
- Calories burned = MET × your weight in kg × time in hours.
- Stroke matters: breaststroke and butterfly (MET ~10–14) burn more than a relaxed freestyle (MET ~8).
- Heavier swimmers burn more for the same swim because moving more mass takes more energy.
- Count only active swimming time, not rest at the wall, for a realistic estimate.
- Water resistance and technique affect the real burn, so use this as a good approximation.
70 kg swimmer, moderate freestyle (MET 8.3), 30 minutes
Inputs
- Body weight: 70 kg
- Stroke & intensity: 8.3
- Duration: 30 min
Calories = 8.3 MET × 70 kg × 0.5 h ≈ 291 kcal, or about 9.7 kcal per minute.
Frequently asked questions
How many calories does swimming burn?
A 70 kg person swimming moderate freestyle burns roughly 290–350 kcal in 30 minutes. Vigorous strokes like butterfly burn substantially more.
Which stroke burns the most?
Butterfly is the most demanding (MET ~13.8), followed by breaststroke and vigorous freestyle. Leisurely swimming and treading water burn the least.
Does swimming help with weight loss?
Yes. It burns a lot of calories while being gentle on the joints, making it a great option for sustainable, low-impact training.
Should I include rest time?
No. Enter only the minutes you're actively swimming. Long rests at the wall don't burn many calories, so leaving them out keeps the estimate accurate.
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