BMR Calculator
Estimate resting calorie expenditure with the Mifflin-St Jeor equation.
Clinical Accuracy
Grade A
About Mifflin-St Jeor
The Mifflin-St Jeor equation (1990) is considered the most accurate formula for estimating resting energy expenditure in healthy adults. It accounts for weight, height, age, and sex.
BMR = (10 × kg) + (6.25 × cm) − (5 × age) + 5
Basal Metabolic Rate
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Enter your details on the left to calculate your BMR.
What Does This Mean?
BMR is your floor — eat below it only under medical supervision.
Multiply by your activity level to get TDEE (maintenance calories).
Use TDEE to set a deficit or surplus for weight goals.
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Research Reference
biotechScientific MethodUses Mifflin-St Jeor for resting energy expenditure and provides Harris-Benedict context.
Mifflin MD et al. (1990)
Am J Clin Nutr.