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Free BMR Calculator

Find your Basal Metabolic Rate.

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About the BMR Calculator

Free BMR calculator. Estimate your Basal Metabolic Rate — the calories your body burns at rest — using the Mifflin-St Jeor equation from your age, sex, height and weight.

How it works

  1. 1

    Enter your details

    Age, sex, height and weight.

  2. 2

    See your BMR

    Your resting calorie burn appears instantly.

Frequently asked questions

Your Basal Metabolic Rate is the number of calories your body needs to keep functioning at rest.

The Mifflin-St Jeor equation, one of the most accurate for most people.

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