Basal metabolic rate (BMR) is the number of calories your body burns at complete rest. It is a foundation for estimating daily calorie needs and planning nutrition.
How to use this calculator
- Enter your weight in kilograms.
- Enter your height in centimeters.
- Enter your age.
- Select your sex.
- Review your estimated BMR.
Formula
BMR is calculated with the Mifflin-St Jeor equation: 10 × weight(kg) + 6.25 × height(cm) − 5 × age + sex offset (+5 for males, −161 for females).
Example
A 30-year-old male at 70 kg and 175 cm has a BMR of about 1,678 calories per day.
Frequently asked questions
What is BMR used for?
BMR helps estimate maintenance calories before activity is added. Many people multiply BMR by an activity factor to estimate total daily energy expenditure.
How is BMR different from TDEE?
BMR covers rest only. TDEE includes BMR plus calories burned through daily activity and exercise.