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Mifflin-St Jeor Equation (Resting Energy Expenditure)

Mifflin-St Jeor estimates resting energy expenditure: 10 × weight (kg) + 6.25 × height (cm) − 5 × age (y) + 5 for men, or − 161 for women. It is the most accurate predictive equation for healthy and obese adults; multiply by an activity factor for total daily needs.

Weight (kg or lb)
Height (cm or m or in)
Age (years)
Sex: Male; Female

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Formula

REE (kcal/day) = 10 × W (kg) + 6.25 × H (cm) − 5 × A (y) + 5 (men) or − 161 (women)

Clinical pearls

Predicts measured REE within ±10% in about 80% of non-obese and 70% of obese adults.
Use actual body weight; not validated in critically ill patients.

Examples

mifflin 80 kg 180 cm 40 male how many calories does a 30 yo woman 60 kg 165 cm burn at rest bmr mifflin 70F 150 lbs 5'4"

FAQ

What is the Mifflin-St Jeor equation?

REE = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5 for men or − 161 for women.

How do I estimate daily calorie needs?

Multiply REE by an activity factor: 1.2 sedentary, 1.375 light, 1.55 moderate, 1.725 very active, 1.9 extremely active.

Evidence

Mifflin MD et al. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr 1990;51:241–7.

General & Anthropometrics · Reviewed 2026-10-14 · Methodology