Mifflin St. Jeor Calculator

Calculate your BMR using the Mifflin-St Jeor equation — the most accurate BMR formula for most adults — and see calorie needs at every activity level.

🧪 Mifflin-St Jeor Calculator

Mifflin-St Jeor BMR: 1,618 kcal/day

BMR (at rest)1,618 kcal/day
very active3,073 kcal/day
active2,790 kcal/day
moderate2,507 kcal/day
light2,224 kcal/day
sedentary1,941 kcal/day

💡 The Mifflin-St Jeor Equation

Published in 1990 by Mifflin, St Jeor, et al. Men: BMR = 10×weight(kg) + 6.25×height(cm) − 5×age − 5 + 5. Women: BMR = 10×weight(kg) + 6.25×height(cm) − 5×age − 161. The '+5 / −161' difference accounts for the sex-based metabolic difference.

A 2005 review by the American Dietetic Association found this equation to be the most accurate for predicting BMR in both normal weight and obese individuals, within 10% of measured BMR for 82% of people.

Male, 70 kg, 170 cm, 30 years: BMR = 10(70) + 6.25(170) − 5(30) + 5 = 1,596 kcal/day.

Mifflin St. Jeor Calculator FAQ

🔗 Related Calculators

Harris-Benedict CalculatorCalculate your BMR and daily calorie needs using the original and revised Harris-Benedict equation. Compare with Mifflin-St Jeor.BMR CalculatorCalculate your Basal Metabolic Rate (BMR) — the calories your body burns at rest. Uses Mifflin-St Jeor and Harris-Benedict equations.TDEE CalculatorCalculate your Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor equation. See BMR and calories burned at each activity level.RMR CalculatorCalculate your Resting Metabolic Rate — the calories you burn at rest including minimal daily movement. Slightly higher than BMR.