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BMR Calculator
Find how many calories your body burns at rest — your daily minimum.
yrs
kg
cm
Basal Metabolic Rate
1618 kcal/day
Calories your body burns at rest
Daily calories by activity
Sedentary (little exercise)1941 kcal
Light (1–3 days/wk)2224 kcal
Moderate (3–5 days/wk)2507 kcal
Active (6–7 days/wk)2790 kcal
Very active (athlete)3073 kcal
Mifflin-St Jeor Formula
Men: 10W + 6.25H − 5A + 5
Women: 10W + 6.25H − 5A − 161
Women: 10W + 6.25H − 5A − 161
W = weight (kg), H = height (cm), A = age (years). Activity multipliers convert BMR into TDEE.
Frequently Asked Questions
What is BMR?
Basal Metabolic Rate — the number of calories your body burns at complete rest just to maintain vital functions (breathing, circulation, temperature).
BMR vs TDEE?
BMR is calories at rest. TDEE (Total Daily Energy Expenditure) = BMR × activity factor. Your actual daily calorie need is TDEE.
Which BMR formula is this?
Mifflin-St Jeor (1990), the most accurate for modern populations. It's used by the American Dietetic Association and most fitness apps.
How do I lose or gain weight using BMR?
Create a daily deficit of 500 kcal vs TDEE to lose ~0.5 kg/week. Add 300–500 kcal for lean gain.