Health & Body Calculators

12 free tools

Calculate BMI, BMR, daily calories, body fat, ideal weight, lean body mass, body ratios and heart rate zones with free health calculators.

All 12 health & body calculators

Calculate your basal metabolic rate with Mifflin–St Jeor, Harris–Benedict or Katch–McArdle.

Find how many calories you need per day to maintain, lose or gain weight.

Estimate your ideal weight with the Robinson, Miller, Devine and Hamwi formulas.

Estimate your body fat percentage with the U.S. Navy tape measure method.

Calculate your lean body mass with the Boer, James and Hume formulas.

Calculate your waist-to-hip ratio and see your health risk level.

Calculate Body Mass Index in metric or imperial units.

Check whether your waist is less than half your height, a simple health marker.

Find out if you have a small, medium or large body frame from your wrist size.

Estimate body fat from hip size and height with the body adiposity index (BAI).

Find your maximum heart rate and five training zones, with the Karvonen method.

Estimate calories burned walking, running or cycling a distance.