BMR Calculator
Calculate your Basal Metabolic Rate (BMR), the calories your body burns at rest, instantly in your browser.
How to use the BMR Calculator
- Select your gender.
- Enter your age in years.
- Enter your height in centimeters and weight in kilograms.
- Click Run to see your basal metabolic rate in calories per day.
How the BMR Calculator works
Your BMR is the energy your body uses at complete rest to keep you alive: breathing, circulation, temperature and cell repair. The calculator uses the Mifflin-St Jeor equation:
Men: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5Women: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age − 161
BMR is usually 60 to 70% of the calories you burn in a day. To estimate your total daily needs including activity, use the Calorie Calculator, which multiplies BMR by an activity factor.
Frequently asked questions
- Is this BMR calculator free?
- Yes. Calculate BMR at no cost, with no account required.
- What is BMR?
- Basal Metabolic Rate (BMR) is the number of calories your body burns at rest to maintain basic physiological functions.
- What formula is used?
- The Mifflin-St Jeor equation is used, which is widely regarded as one of the most accurate BMR formulas.