EEasynivo
Free online tool

Calorie Calculator

Estimate adult resting energy and daily maintenance calories from body size and activity.

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Maintenance calories

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Enter the values and choose Calculate.

Resting estimate—
Maintenance calories—
Gradual loss estimate—
Gradual gain estimate—

How it works

Use the Mifflin–St Jeor equation as a starting estimate, not a medical prescription.

Formula and method

RMR = 10×kg + 6.25×cm − 5×age + sex constant; daily need = RMR × activity factor.

Worked example

A 30-year-old, 70 kg, 175 cm moderately active man is estimated near 2,556 kcal/day.

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Sources & methodology

Calculation method
RMR = 10×kg + 6.25×cm − 5×age + sex constant; daily need = RMR × activity factor.
Evidence basis
Published research equation used for an educational estimate.
Applies to
No statutory reference year. Results use the values and assumptions entered now.
Last reviewed
Limitations
Energy needs vary with health, body composition and activity. Treat the result as a starting estimate, not a prescription.

Sources

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Content basis and verification

· Calculations run in your browser. Check the formula and assumptions on this page, and confirm important financial, tax, medical or legal decisions against current official guidance.