BMR Calculator
Calculate your Basal Metabolic Rate — calories your body burns at rest. Three formulas with activity level multipliers.
Your BMR (Mifflin-St Jeor)
1,737
calories/day at rest
Mifflin-St Jeor
1737
Harris-Benedict
1804
Katch-McArdle
1702
Daily Calories by Activity Level
Sedentary (little/no exercise)2,084 cal
Light (1-3 days/week)2,388 cal
Moderate (3-5 days/week)2,692 cal
Active (6-7 days/week)2,996 cal
Very Active (2x/day)3,300 cal
Frequently Asked Questions
What is BMR?+
Basal Metabolic Rate is the number of calories your body needs at complete rest to maintain basic functions like breathing, circulation, and cell production. It typically accounts for 60-75% of daily energy expenditure.
Which BMR formula is best?+
Mifflin-St Jeor is considered the most accurate for most people. Harris-Benedict tends to overestimate slightly. Katch-McArdle is best if you know your body fat percentage.
How is BMR different from TDEE?+
BMR is calories at rest. TDEE (Total Daily Energy Expenditure) = BMR × activity multiplier. TDEE includes all daily activity and exercise. Use TDEE for calorie planning, not BMR alone.