BMR Calculator - Free Basal Metabolic Rate
Find your basal metabolic rate with the Mifflin-St Jeor equation.
Tool Interface
BMR Calculator
Find your basal metabolic rate — calories burned at complete rest.
calories per day at rest (Mifflin-St Jeor)
How to use
Pick metric or imperial, enter sex, age, height, and weight, then press Calculate BMR. The result is your estimated daily calorie burn at complete rest.
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About This Tool
Frequently Asked Questions (FAQ)
What is BMR?
Basal Metabolic Rate is the number of calories your body burns at complete rest to keep you alive, before any activity or exercise.
How is BMR calculated?
It uses the Mifflin-St Jeor equation, the most widely validated formula, based on your sex, age, height and weight.
What is the difference between BMR and TDEE?
BMR covers resting calorie burn only. TDEE, Total Daily Energy Expenditure, adds your daily activity and exercise on top of BMR.
How accurate is the result?
It is a well-tested estimate for most adults, but individual metabolism varies with muscle mass, hormones and health conditions.
Is the BMR calculator free?
Yes. It is free to use with no signup and no limits.