Mifflin–St Jeor
The equation estimates resting energy expenditure from weight, height, age and sex.
HEALTH
BMR Calculator
Estimate resting energy expenditure using the Mifflin–St Jeor equation.
Estimated resting energy
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Enter your details to calculate.
BMR Calculator guide
Resting energy
This is energy used by the body at rest and is not the same as total daily calorie needs.
Estimate only
Individual metabolism can differ from predictive equations.
Frequently asked questions
Is BMR the same as daily calorie needs?
No. Total daily energy use also includes movement, exercise and the energy cost of digestion.
Is this a medical measurement?
No. It is an estimate from a predictive equation, not a direct metabolic test.
Why does the equation ask for sex?
The published Mifflin–St Jeor equations use different constants for male and female subjects.