MEDICINE · FREE TOOL
Adult calorie scenario calculator
Explore resting energy and a user-chosen activity multiplier for adults.
Your inputs
Enter your values, then calculate.
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
Mifflin–St Jeor original equation:9.99×kg +6.25×cm −4.92×age +166×sex −161. Here sex is the original study coefficient, male 1/female 0. Multiplying by your activity assumption gives a scenario, not a validated personal calorie prescription. Adults 20–78 only; not pregnancy, breastfeeding or clinical nutrition.
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.