Tools > BMR Calculator

BMR Calculator: Calculate Your Basal Metabolic Rate

Your Basal Metabolic Rate (BMR) is the number of calories your body burns at rest to perform basic life-sustaining functions like breathing, circulation, and cell production.

Knowing your BMR is the first step to successful weight management.

Calculate Your BMR

Accurately estimate your daily calorie needs at rest.

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Note: This calculator uses the Harris-Benedict equation, which is considered by many experts to be the most accurate BMR calculation for most types of people.

Your BMR

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calories / day

This is the number of calories your body burns every day just to stay alive. It does not include exercise or daily activity.

The Science

Understanding BMR

How did we calculate your BMR?

This calculator uses the Harris-Benedict equation, which is considered by many experts to be the most accurate BMR calculation for most types of people. Here's how it works:

For men: BMR = 66.5 + (13.75 × weight in kg) + (5.003 × height in cm) - (6.755 × age in years)

For women: BMR = 655.1 + (9.563 × weight in kg) + (1.850 × height in cm) - (4.676 × age in years)

Bear in mind that this doesn't take your activity level into account!

Does BMR change with age?
Yes, BMR typically decreases as you age. This is often due to a loss of muscle mass (sarcopenia) and changes in hormonal function. Staying active and strength training can help mitigate this decline.