BMR Calculator

Your Basal Metabolic Rate (BMR) is the energy your body needs at complete rest just to keep vital functions running — breathing, circulation, cell repair. It typically accounts for 60–70% of all calories you burn in a day.

This calculator uses the Mifflin-St Jeor equation, widely regarded as the most reliable estimate for most people. To find out how much you burn in a real day including movement and exercise, use the TDEE calculator, which multiplies BMR by an activity factor.