🏊 Swimming Calories Calculator: Calories Burned Swimming

Swimming works the whole body. See how many calories your session burned by stroke.

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Formula at a glance

Swimming Calories Calculator: Calories — MET × 3.5 × kg ÷ 200 × minutes. Example: 30 minutes freestyle, 70 kg → Calories burned: 213 kcal
How the Swimming Calories Calculator works: Calories — MET × 3.5 × kg ÷ 200 × minutes

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📘 About the Swimming Calories Calculator

Swimming is one of the best whole-body workouts and puts no impact on the joints. The stroke matters a lot: butterfly and fast freestyle are very vigorous, while leisurely swimming and water aerobics are moderate.

Pick the stroke and time; the calculator uses MET values from the Compendium of Physical Activities. Add laps and the pool length to see your distance and pace per 100 m.

🧮 Formula

Calories
MET × 3.5 × kg ÷ 200 × minutes
Pace
Minutes ÷ (laps × pool length ÷ 100)

✏️ Worked examples

30 minutes freestyle, 70 kg

You enter
StrokeFreestyle — slow / moderate
Time30 minutes
Laps (optional)40
Pool length25 m
Your weight70 kg
Weight inkg
You get
Calories burned213 kcal
StrokeFreestyle, slow / moderate for 30 min
Distance1,000 m (33 m per minute; 3 min per 100 m)
Per hour at this effort426 kcal
Calories above resting176 kcal
Fat equivalent28 g (7,700 kcal ≈ 1 kg of body fat)
MET value used5.8

213 kcal.

20 minutes butterfly, 75 kg

You enter
StrokeButterfly
Time20 minutes
Pool length25 m
Your weight75 kg
Weight inkg
You get
Calories burned362 kcal
StrokeButterfly for 20 min
Per hour at this effort1,087 kcal
Calories above resting336 kcal
Fat equivalent47 g (7,700 kcal ≈ 1 kg of body fat)
MET value used13.8

362 kcal.

🧭 How to use this calculator

What you enter

  • Stroke
  • Time (minutes)
  • Laps (optional)
  • Pool length (m)
  • Your weight (kg)
  • Weight in

What you get

  • Calories burned
  • Stroke
  • Per hour at this effort
  • Calories above resting
  • Fat equivalent
  • MET value used

💡 Swimming tips

  • Warm up with 2–3 easy laps.
  • Alternate strokes to work different muscles.
  • Use a kickboard or pull buoy to build technique.
  • Drink water — you sweat even in the pool.

❓ Frequently asked questions

How many calories does 30 minutes of swimming burn?

About 200–350 kcal for a 70 kg person, more for butterfly or fast laps.

Which swimming stroke burns the most calories?

Butterfly, then fast freestyle and training breaststroke.

Is swimming good for weight loss?

Yes, but cold water can make you hungrier afterwards, so watch the post-swim snack.