BMR Calculator
Calculate your Basal Metabolic Rate — the calories you burn at rest.
Basal metabolic rate
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Weight-loss intake
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Weight-gain intake
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Results update as you type.
About this calculator
Your Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest to keep vital functions running. This calculator uses the Mifflin-St Jeor equation, the current standard. Multiply BMR by an activity factor to get maintenance calories.
Frequently asked questions
What is the Mifflin-St Jeor equation?
For men: BMR = 10×kg + 6.25×cm − 5×age + 5. For women the last term is −161. It is the most accurate simple BMR formula for most people.
Is BMR the same as calories I should eat?
No. BMR is your at-rest burn. To maintain weight you eat around your BMR times an activity factor (your TDEE), which is higher.
Results are estimates for general guidance only, not financial, medical or tax advice.