Harris-Benedict Calculator

Calculate your BMR using the original (1919) and revised (1984) Harris-Benedict equations. Compare with the Mifflin-St Jeor formula.

🔬 Harris-Benedict Calculator

BMR Comparison

HB Original (1919)1,677 kcal/day
HB Revised (1984)1,672 kcal/day
Mifflin-St Jeor1,618 kcal/day

Daily Calories (TDEE)

HB Original2,599 kcal
HB Revised2,591 kcal
Mifflin-St Jeor2,507 kcal

💡 The Harris-Benedict Equation

Original (1919) — Men: 66.5 + 13.75×W + 5.003×H − 6.755×A. Women: 655.1 + 9.563×W + 1.850×H − 4.676×A. This was the standard for decades but tends to overestimate BMR.

Revised (1984, Roza & Shizgal) — Men: 88.362 + 13.397×W + 4.799×H − 5.677×A. Women: 447.593 + 9.247×W + 3.098×H − 4.330×A. More accurate than the original but still overestimates slightly compared to modern equations.

30-year-old male, 70 kg, 170 cm: Original = 1,671, Revised = 1,668, Mifflin-St Jeor = 1,596 kcal.

Harris-Benedict Calculator FAQ

🔗 Related Calculators

Mifflin St. Jeor CalculatorCalculate your BMR using the Mifflin-St Jeor equation — the most accurate BMR formula for most adults. See daily calorie needs at all activity levels.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.Calorie CalculatorCalculate how many calories you need per day to maintain, lose, or gain weight based on age, gender, height, weight, and activity level.