BMR Calculator
Your Basal Metabolic Rate is the number of calories your body burns at complete rest. Calculated using two leading formulas.
Which formula is more accurate?
Mifflin-St Jeor (1990) — Recommended
Generally considered the most accurate formula for most people. Validated in multiple studies and preferred by dietitians.
Men: BMR = (10 × kg) + (6.25 × cm) − (5 × age) + 5
Women: BMR = (10 × kg) + (6.25 × cm) − (5 × age) − 161
Harris-Benedict (revised 1984)
The original formula, revised in 1984. Tends to overestimate by about 5% compared to Mifflin-St Jeor.
Men: BMR = 88.362 + (13.397 × kg) + (4.799 × cm) − (5.677 × age)
Women: BMR = 447.593 + (9.247 × kg) + (3.098 × cm) − (4.330 × age)
Neither formula accounts for body composition — a muscular person burns more calories at rest than someone of the same weight with higher body fat.
Read: TDEE Explained: How Many Calories Do You Actually Burn in a Day? — see how BMR fits into TDEE, how activity multipliers work, and how to set a realistic calorie target.
Read the TDEE guide →