MEDICINE · FREE TOOL
Resting energy / BMR estimate
Calculate a resting-energy estimate with the original Mifflin–St Jeor equation.
Your inputs
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Decimal-point numbers; displayed rounding does not change internal values. Calculations stay on this device.
YOUR RESULT
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Save calculation JSON ↓Calculation breakdown
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How this calculation works
This common “BMR calculator” estimates resting energy expenditure; it does not measure basal metabolism. Original study coefficients:9.99kg +6.25cm −4.92age +166sex −161. Ages 20–78; no activity multiplier. No weight-loss target, pregnancy/lactation adjustment or clinical recommendation.
Reference: method and limitations. Method reviewed October 22, 2026.
Check the assumptions
Health calculations are educational estimates and do not replace a clinician’s assessment. Your inputs and individual circumstances can materially change how useful an estimate is.