Swimming Calorie Calculator
Calculate calories burned swimming any stroke at any speed. Swimming burns more calories than most people expect — find out what your session is really worth.
Swimming for Fitness Guide
Calorie Burn by Stroke
Approximate calories burned per hour for a 75 kg swimmer: butterfly 700-900 kcal (the highest intensity stroke), front crawl fast 600-800 kcal, front crawl moderate 450-600 kcal, breaststroke 400-600 kcal, backstroke 400-500 kcal, recreational mixed 300-400 kcal, water aerobics 250-350 kcal. Swimming burns significantly more calories per hour than walking and is comparable to running, with much lower joint impact. The calorie burn depends heavily on effort level — a leisurely swim burns far less
Swimming vs Running
Swimming burns approximately 60-70% as many calories per km as running, but without the impact load — making it suitable for runners with injuries, older adults, and those with joint conditions. The cardiovascular adaptation from swimming is highly specific — swimmers often find their running cardiovascular fitness does not fully transfer to the pool and vice versa. For cross-training purposes, swimming provides excellent cardiovascular stimulus with near-zero injury risk. Olympic swimmers typic
Improving Swim Fitness
For beginners: structured rest-interval swimming is more productive than continuous slow swimming. Rest for 30-60 seconds between lengths, allowing near-full recovery. As fitness improves, reduce rest intervals rather than increasing length. Structured workouts improve fitness faster than any length of casual swimming. Sets to build aerobic base: 10 × 100m with 20 seconds rest. Speed intervals: 6 × 50m fast with 40 seconds rest. Endurance: 400m + 300m + 200m + 100m with 45 seconds between each.
Open Water vs Pool Swimming
Open water swimming (sea, lakes, rivers) burns 10-20% more calories than equivalent pool swimming due to water temperature (body works harder to maintain core temperature), currents and waves requiring more effort to maintain course, and the absence of wall turns that provide brief rest periods. Cold water swimming (below 15°C) has additional metabolic demands — acclimatisation over several weeks is essential before cold water exposure. Open water swimming carries inherent risks: always swim wit
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