Mifflin-St Jeor Calculator

Calculate your BMR using the most accurate formula for basal metabolic rate

Most Accurate BMR Formula
Modern Equation (2005)
Recommended by Nutritionists
90% Accuracy Rate

Enhanced BMR Calculator

Calculate your Basal Metabolic Rate with personalized insights and recommendations

Most accurate for most people

This determines your Total Daily Energy Expenditure (TDEE)

About the Mifflin-St Jeor Formula

The Mifflin-St Jeor equation is widely considered the most accurate formula for calculating Basal Metabolic Rate (BMR) in the general population. Developed in 2005 by MD Mifflin and ST St Jeor, this formula was created using data from healthy individuals and has been validated as more accurate than the older Harris-Benedict equation. It accounts for age, gender, weight, and height to estimate your resting metabolic rate with approximately 90% accuracy compared to laboratory metabolic testing.

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💡 Why Choose Mifflin-St Jeor?

This formula is recommended by most nutritionists and dietitians because it's more accurate for today's population. It tends to be about 5% more accurate than the Harris-Benedict equation, especially for overweight and obese individuals.

Frequently Asked Questions

Mifflin-St Jeor is considered more accurate because it was developed more recently (2005) using data from modern populations. It accounts for changes in body composition and lifestyle that have occurred since the Harris-Benedict equation was developed in 1919. Clinical studies show it has about 90% accuracy compared to metabolic testing.

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Mifflin-St Jeor Formula Details

The mathematical formula and scientific background of the Mifflin-St Jeor equation

Metric:Men: BMR ​=​ ​(​10 ​×​ weight in kg​)​ ​+​ ​(​6.25 ​×​ height in cm​)​ ​-​ ​(​5 ​×​ age in years​)​ ​+​ 5 | Women: BMR ​=​ ​(​10 ​×​ weight in kg​)​ ​+​ ​(​6.25 ​×​ height in cm​)​ ​-​ ​(​5 ​×​ age in years​)​ ​-​ 161
Imperial:For imperial units: Men: BMR ​=​ ​(​10 ​×​ weight in kg​)​ ​+​ ​(​6.25 ​×​ height in cm​)​ ​-​ ​(​5 ​×​ age in years​)​ ​+​ 5 | Women: BMR ​=​ ​(​10 ​×​ weight in kg​)​ ​+​ ​(​6.25 ​×​ height in cm​)​ ​-​ ​(​5 ​×​ age in years​)​ ​-​ 161

Formula

Men: BMR ​=​ ​(​10 ​×​ weight in kg​)​ ​+​ ​(​6.25 ​×​ height in cm​)​ ​-​ ​(​5 ​×​ age in years​)​ ​+​ 5
Women: BMR ​=​ ​(​10 ​×​ weight in kg​)​ ​+​ ​(​6.25 ​×​ height in cm​)​ ​-​ ​(​5 ​×​ age in years​)​ ​-​ 161

Scientific Background

The Mifflin-St Jeor equation was developed in 2005 and published in the Journal of the American Dietetic Association. It was created using data from 498 healthy individuals (247 men and 251 women) and was validated as more accurate than the Harris-Benedict equation, especially for obese individuals. The formula has an accuracy rate of approximately 90% compared to indirect calorimetry measurements. It's considered the gold standard for BMR estimation in clinical practice and is recommended by the Academy of Nutrition and Dietetics.

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