Harris-Benedict BMR Calculator
Calculate your Basal Metabolic Rate using the original Harris-Benedict equation.
The Legacy of Harris-Benedict
Created in 1919, the Harris-Benedict equation was the first widely adopted scientific formula for estimating human Basal Metabolic Rate (BMR). It paved the way for modern sports nutrition.
The Formula
The calculation uses your sex, age, weight, and height to estimate the number of calories your body burns at absolute rest:
- Men: BMR = 88.362 + (13.397 x weight in kg) + (4.799 x height in cm) - (5.677 x age)
- Women: BMR = 447.593 + (9.247 x weight in kg) + (3.098 x height in cm) - (4.330 x age)
Frequently Asked Questions
Should I use this or Mifflin-St Jeor?
Modern dietitians heavily favor the Mifflin-St Jeor equation. Because the Harris-Benedict equation was developed over a century ago, it tends to overestimate the metabolic rate of modern, more sedentary individuals by about 5%.
Disclaimer: This calculator is for educational and informational purposes only. It is not a medical diagnosis or professional medical advice. The results provided should not be relied upon as a substitute for professional medical evaluation. Individual health needs vary greatly based on age, medical history, lifestyle, and other factors. Consult a qualified healthcare provider, doctor, or registered dietitian before making any health or medical decisions. If you are experiencing health concerns, seek immediate medical attention.