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Calorie Calculator

Estimate adult resting daily energy expenditure using the Mifflin–St Jeor equation.

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For adults only. This is an approximate energy estimate, not a diet prescription or medical advice. The two equation constants come from the published Mifflin–St Jeor equations.

Method: Mifflin et al., 1990.

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How to use this tool

Enter adult age, height, weight and the published equation constant. Select Calculate for an approximate resting energy estimate.

Important to know

Estimate adult resting daily energy expenditure using the Mifflin–St Jeor equation.

For adults aged 19–78 only. The result is an estimate, not a calorie target, diagnosis or individualized medical advice. The published equations use two sex-based constants; select the equation appropriate to your circumstances with professional guidance when needed.

Formula and methodology

Resting kcal/day = 10 × weight (kg) + 6.25 × height (cm) − 5 × age (years) + constant (+5 or −161). Source: Mifflin et al., American Journal of Clinical Nutrition, 1990, DOI 10.1093/ajcn/51.2.241.

Example

For age 30, 70 kg, 175 cm and the +5 equation, the estimate is about 1,649 kcal/day.

Frequently asked questions

Is this a recommended daily intake?

No. It estimates resting expenditure only; actual needs depend on activity and individual health factors.