Calculate your Basal Metabolic Rate — the calories your body burns at rest.
This BMR calculator estimates the number of calories your body burns at complete rest using two established formulas: the Mifflin-St Jeor equation (1990) and the revised Harris-Benedict equation (1984). Your BMR accounts for about 60-75% of your total daily energy expenditure.
Two validated formulas
Compare Mifflin-St Jeor and Harris-Benedict side by side.
TDEE estimates
See how activity level multiplies your BMR into daily burn.
Metric & imperial
Supports kg/cm or lbs/ft-in.
100% private
All calculations run in your browser.