BMR (Basal Metabolic Rate) Calculator

Use this bmr (basal metabolic rate) calculator for an approximate adult fitness calculation. Choose US units for pounds, inches or yards, or switch to metric. Results are estimates, not medical or training prescriptions.

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Body Weightkg

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Ageyears

Results

Basal Metabolic Rate—

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Results update live as you type. Estimates only — not financial, tax, or investment advice.

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The Formula

BMR (Mifflin-St Jeor) = (10 × weight kg) + (6.25 × height cm) − (5 × age) + 5 (men) or − 161 (women)

Understanding the BMR (Basal Metabolic Rate) Calculator

Worked example: An 80 kg (176.4 lb), 180 cm (70.9 in), 30-year-old male has an estimated resting expenditure of 1,780 kcal/day.

Mifflin–St Jeor estimates resting expenditure, not a minimum intake or maintenance requirement. Individual measurements can differ.

Frequently Asked Questions

How is the result calculated?

BMR (Mifflin-St Jeor) = (10 × weight kg) + (6.25 × height cm) − (5 × age) + 5 (men) or − 161 (women)

What should I know about this estimate?

Mifflin–St Jeor estimates resting expenditure, not a minimum intake or maintenance requirement. Individual measurements can differ.