BMR Calculator
This free BMR calculator finds your Basal Metabolic Rate — the calories your body burns at complete rest. Use it alone or with our calorie / TDEE calculator for maintenance and deficit planning.
How basal metabolic rate is calculated
This metabolic rate calculator uses the Mifflin-St Jeor equation, widely considered one of the most accurate BMR formulas for the general population:
Where W is weight in kilograms, H is height in centimeters, and A is age in years.
BMR vs. TDEE
BMR only accounts for rest; your Total Daily Energy Expenditure (TDEE) adds daily activity and exercise — what you need to eat to maintain weight. Use our Calorie Calculator (TDEE) for that full picture and weight-goal targets.
Frequently Asked Questions
What is basal metabolic rate (BMR)?
BMR is the number of calories your body burns at complete rest to keep vital organs running. This BMR calculator estimates it from height, weight, age, and sex.
Is BMR the same as metabolic rate or TDEE?
BMR is resting metabolic rate only. TDEE (total daily energy expenditure) includes activity and is usually higher than BMR.
Which formula does this use?
Mifflin-St Jeor, a common and accurate basal metabolic rate calculator formula for adults.