BMR Calculator
Calculate your Basal Metabolic Rate (BMR) — the number of calories your body burns at complete rest to maintain vital functions. We use the accurate Mifflin-St Jeor equation and show your needs at different activity levels.
Formula reviewed for accuracy. Our methodology & sources
BMR Calculator
health calculator
How It Works
The calculator applies the Mifflin-St Jeor equation, the formula most dietitians consider the most accurate for estimating resting calorie needs from weight, height, age, and sex. The result is the energy your body would burn if you did nothing but rest all day. To turn that into the calories you actually need, the calculator also multiplies your BMR by activity factors — from sedentary to very active — so you can see realistic daily targets.
Formula
BMR (men) = 10×kg + 6.25×cm − 5×age + 5 BMR (women) = 10×kg + 6.25×cm − 5×age − 161
Examples
30yo male, 70kg, 175cm
BMR around 1,649 calories per day.
Frequently Asked Questions
What is BMR?
Basal Metabolic Rate is the number of calories your body needs at rest to maintain basic functions like breathing, circulation, and cell production. It accounts for 60-75% of daily calorie burn.
How is BMR different from TDEE?
BMR is calories burned at rest. TDEE (Total Daily Energy Expenditure) is BMR plus calories burned through activity. Multiply BMR by an activity factor to get TDEE.
Sources
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