BMR Calculator
Calculate your basal metabolic rate (BMR) - the calories your body burns at rest.
Your BMR is the energy your body burns at complete rest. Multiply it by an activity factor to estimate your total daily calorie needs.
This tool is for general information only and is not medical advice. Talk to a qualified healthcare professional before making health decisions.
About the BMR Calculator
Your basal metabolic rate (BMR) is the number of calories your body needs just to keep working at complete rest: breathing, circulation and basic cell function.
This calculator uses the Mifflin-St Jeor equation, one of the most accurate BMR formulas, based on your age, sex, height and weight. Multiply the result by an activity factor to estimate your full daily calorie needs.
Enter metric or imperial units and get an instant result, calculated privately in your browser.
Key features
- Accurate Mifflin-St Jeor formula
- Metric and imperial units
- Instant result in kcal per day
- Private, in-browser calculation
How to use
- 1Enter your weight and height.
- 2Enter your age and sex.
- 3Read your BMR in calories per day.
Frequently asked questions
- What is the difference between BMR and TDEE?
- BMR is the calories burned at complete rest. TDEE adds the energy used for daily activity and exercise, so it is always higher than BMR.
- Why does BMR matter?
- BMR is the starting point for planning calories. Knowing it helps you set realistic targets for maintaining, losing or gaining weight.