Last updated: March 2, 2026 by Maria Gonzalez

How Many Calories Does Swimming Burn?

Formula

Swimming is a full-body workout that burns significant calories while being gentle on joints. Calorie burn varies greatly depending on stroke type and intensity.

Butterfly is the most demanding stroke with a MET of about 13.8, while leisurely backstroke has a MET around 4.8. Freestyle is the most common stroke, with moderate effort at 5.8 MET and vigorous at 9.8 MET.

Common use cases:

  • Planning swim workouts for fitness
  • Comparing calorie burn across strokes
  • Cross-training calorie estimation

Frequently Asked Questions

MG

Maria Gonzalez

Registered Dietitian, RD, MPH

Maria is a Registered Dietitian with a Master's in Public Health. She focuses on evidence-based nutrition assessment tools including BMI, calorie calculations, and body composition analysis.

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