BMR Calculator
Basal metabolic rate — calories burned at complete rest.
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The formula
Mifflin–St Jeor: 10·kg + 6.25·cm − 5·age + s
Basal metabolic rate is the energy your body burns doing nothing at all — breathing, circulation, keeping warm. It is the single largest slice of most people’s daily calorie use, which is why every diet target starts here and multiplies up by an activity factor.
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Example calculations
Common questions this calculator answers — select one to load its values.
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Frequently asked questions
What is BMR?+
Basal metabolic rate is the energy your body uses at rest to keep vital functions running. Multiply it by an activity factor to estimate daily needs.
All calculations run locally in your browser. Nothing you type is sent to a server.