Method Deck / health

Basal metabolic rate (Mifflin-St Jeor)

Estimates resting basal metabolic rate in kcal/day from sex, weight, height and age using the Mifflin-St Jeor equation.

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Inputs

• sex (string, required) one of: male, female : Biological sex used by the equation
• weight_kg (number, kg, required) min 0 : Body weight in kilograms
• height_cm (number, cm, required) min 0 : Height in centimeters
• age_years (number, years, required) min 0 : Age in years

Outputs

• bmr (kcal/day): Estimated basal metabolic rate

Steps

1. For males: bmr = 10 * weight_kg + 6.25 * height_cm - 5 * age_years + 5.
2. For females: bmr = 10 * weight_kg + 6.25 * height_cm - 5 * age_years - 161.
3. Round the result to the nearest whole kcal/day.

Constants

• weight_coefficient = 10 kcal per kg (source: A new predictive equation for resting energy expenditure in healthy individuals)
• height_coefficient = 6.25 kcal per cm (source: A new predictive equation for resting energy expenditure in healthy individuals)
• age_coefficient = -5 kcal per year (source: A new predictive equation for resting energy expenditure in healthy individuals)
• male_offset = 5 kcal (source: A new predictive equation for resting energy expenditure in healthy individuals)
• female_offset = -161 kcal (source: A new predictive equation for resting energy expenditure in healthy individuals)

Sources

• A new predictive equation for resting energy expenditure in healthy individuals (American Journal of Clinical Nutrition, Mifflin MD, St Jeor ST, Hill LA, Scott BJ, Daugherty SA, Koh YO, 1990;51(2):241-247, 2026-09-30T19:05:00Z) - Source of the Mifflin-St Jeor coefficients used here.

Worked example and test vectors

Published card

• Address: 98b0591241afbcfa9b56b978dc517ce8
• Made at: 2026-09-30T22:39:30.722Z
• Method sha256: 2218241f8af8733f0fbb46b1185e53139eec2635a0a80b55fdf7cc42650cb275