BMR Calculator

Estimate basal metabolic rate, the approximate calories your body uses at rest, from the personal measurements entered.

BMR Calculator

Basal metabolic rate (BMR) is an estimate of the energy your body needs to support basic functions while at rest. The BMR Calculator uses the information you enter to provide a daily calorie estimate for resting energy needs.

BMR formula

A commonly used Mifflin-St Jeor equation is: for men, BMR = 10W + 6.25H βˆ’ 5A + 5; for women, BMR = 10W + 6.25H βˆ’ 5A βˆ’ 161, where W is weight in kilograms, H is height in centimeters, and A is age in years.

Using the calculator

Enter your age, sex, height, and weight in the requested units. Review the inputs before calculating because even a small measurement error can change the estimate.

BMR versus daily calorie needs

BMR represents resting energy needs, not the total calories you normally burn in a day. Daily energy expenditure also includes physical activity, digestion, and other movement.

Frequently Asked Questions FAQ

What is BMR?
BMR is the estimated amount of energy the body uses at rest to support basic physiological functions.
What formula is commonly used to calculate BMR?
The Mifflin-St Jeor equation is a commonly used BMR formula based on weight, height, age, and sex.
Is BMR the same as daily calorie needs?
No. BMR is resting energy use, while daily calorie needs also include activity and other energy expenditure.
Why can two people with the same weight have different BMR values?
BMR can differ because factors such as height, age, sex, and body composition are not identical.

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