Swimming Calories Burned Calculator
Calculate calories burned swimming by stroke type, duration, and intensity.
Covers freestyle, backstroke, breaststroke, and butterfly.
Calories burned swimming depend on the stroke used, intensity, body weight, and duration. Swimming is one of the most effective full-body exercises, burning significant calories while being low-impact on joints.
Calorie burn formula:
Calories = MET × Weight (kg) × Duration (hours)
Where MET (Metabolic Equivalent of Task) varies by stroke and intensity.
MET values for swimming strokes:
| Stroke | Light Effort | Moderate Effort | Vigorous Effort |
|---|---|---|---|
| Freestyle (front crawl) | 5.8 | 8.0 | 10.0 |
| Backstroke | 4.8 | 7.0 | 9.5 |
| Breaststroke | 5.3 | 7.0 | 10.3 |
| Butterfly | 8.0 | 11.0 | 13.8 |
| Sidestroke | 5.0 | 7.0 | 8.0 |
| Treading water | 3.5 | 5.0 | 9.8 |
Calories per hour by body weight (moderate effort):
| Stroke | 130 lb (59 kg) | 155 lb (70 kg) | 180 lb (82 kg) | 205 lb (93 kg) |
|---|---|---|---|---|
| Freestyle | 472 | 563 | 654 | 745 |
| Backstroke | 413 | 493 | 572 | 652 |
| Breaststroke | 413 | 493 | 572 | 652 |
| Butterfly | 649 | 774 | 899 | 1,024 |
Swimming vs other exercises (per hour, 155 lb person):
- Swimming (moderate freestyle): 563 cal
- Running (6 mph): 596 cal
- Cycling (12–14 mph): 563 cal
- Walking (3.5 mph): 267 cal
Factors affecting calorie burn:
- Water temperature: Cold water increases calorie burn as the body works to maintain temperature.
- Efficiency: Better swimmers use fewer calories per lap (but can swim longer/faster).
- Intervals: Alternating fast and slow laps burns more calories than steady-state.
Tip: For weight loss, combine swimming with a balanced diet. Swimming often increases appetite significantly, so be mindful of post-swim eating. Tracking your laps and time helps measure progress over weeks and months.