Open water vs pool?
Pick stroke effort that matches average intensity.
Swimming Calorie Calculator
Estimate pool or open-water calorie burn by stroke, minutes, and weight.
Stroke and duration
Pick stroke intensity and enter minutes swimming.
About this calculator
How to use Swimming Calorie Calculator, plus the formulas and logic behind the results.
Tool description
Swimming MET varies by stroke and effort. Butterfly and strong freestyle rank among the highest burn rates in the pool.
How to use
- Choose stroke matching most of the workout.
- Enter active swim minutes (exclude long rest if separate).
- Add weight.
- Read kcal estimate.
Formulas & reference
Calories = MET × weight(kg) × hoursFreestyle moderate ≈ 8.3 METButterfly ≈ 10.0 METLeisurely ≈ 5.8 MET
Stroke MET (approx.)
- Leisurely: ~5.8
- Breast/back: ~7.0
- Freestyle moderate: ~8.3
- Butterfly: ~10.0
Calculation logic
Stroke selection maps to compendium MET, standard energy equation applied.
Cold water, wetsuits, and flip-turn efficiency change real expenditure.
Swimming Calorie Calculator FAQ
Common questions about this calculator and how to use the results.
Water aerobics?
Use leisurely unless you swim laps hard.
Rest between lengths?
Include rest in minutes if it was continuous pool time block.
Wetsuit triathlon swim?
Often moderate freestyle effort for most age-groupers.
Heavier swimmers burn more?
Yes—MET scales with body mass in this model.
Cold pool?
Shivering after exit adds burn not counted here.