Calorie calculator

Estimate daily maintenance calories from weight, height, age and the activity multiplier you choose.

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Weight (kg)

Height (cm)

More inputs and assumptions

Age (years)

Sex used by the study equation

Daily activity multiplier (your assumption)

Answer

…

Resting kcal/day = 10 × kg + 6.25 × cm − 5 × age + 5 (male) or −161 (female). Daily expenditure estimate = resting kcal/day × your activity multiplier.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

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Formula and assumptions

The Mifflin–St Jeor equation estimates resting expenditure in healthy adults; it is not a measurement. The activity multiplier is an assumption you supply; 1.6 is an example, not a recommendation. Not for children, pregnancy, breastfeeding, illness or an eating-disorder care plan. This estimates maintenance expenditure and does not prescribe calorie restriction. A clinician or registered dietitian can help interpret individual needs.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-29

Using Calorie calculator

Resting kcal/day = 10 × kg + 6.25 × cm − 5 × age + 5 (male) or −161 (female). Daily expenditure estimate = resting kcal/day × your activity multiplier.

Next: Calorie density calculator

Next: Calories per serving calculator

A worked example

For weight (kg) = 70, height (cm) = 175, age (years) = 30, sex used by the study equation = Male, daily activity multiplier (your assumption) = 1.6, estimated daily expenditure (kcal) = 2638.

Before you use the result

Example results for weight (kg)

These examples use Height (cm): 175; Age (years): 30; Sex used by the study equation: Male; Daily activity multiplier (your assumption): 1.6. They are reference calculations, not recommended settings.

Weight (kg)	Estimated daily expenditure (kcal)
35	2078
70	2638
140	3758

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