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Health & Fitness Calculators

All health & fitness calculators, free and private.

6 calculators

BMI Calculator

BMI, WHO category and healthy weight range — metric or imperial.

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Calorie Calculator

Daily calorie needs (TDEE) and weight-change targets by activity level.

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BMR Calculator

Basal metabolic rate via three validated formulas.

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Body Fat Calculator

Body fat %, fat mass and lean mass from measurements.

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Calories Burned Calculator

Calories burned for 50+ activities by weight and time.

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Pace Calculator

Pace per km/mile, speed and finish times for runners.

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Private by design

Your data never leaves your device.

Every calculation on this site runs in your browser using vanilla JavaScript. Nothing is uploaded, stored or tracked.

  • 100% local, client-side calculations
  • No data stored on any server
  • No tracking, no analytics, no ads scripts
  • Works offline once loaded