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Calories your body burns at complete rest
Enter your details and calculate to see your BMR.
About BMR Calculator
Basal Metabolic Rate (BMR) is the number of calories your body needs at complete rest to maintain vital functions like breathing, circulation, and cell production.
This calculator uses the Mifflin-St Jeor equation, a widely used formula for estimating daily resting calorie needs from age, sex, height, and weight.
Quick tips
- BMR is not the same as total daily calories (TDEE)
- Activity level multiplies BMR to estimate full-day needs
- Recalculate after significant weight changes