This BMR calculator is provided for informational purposes only and does not replace professional medical or nutritional advice. Results are estimates based on formulas and may vary based on individual factors. Always consult a qualified healthcare provider before making decisions about your diet or health.
TDEE (Total Daily Energy Expenditure) is a method used alongside the BMR to calculate the amount of calories your body needs to function in a day based on your activity levels. These levels are grouped as follows:
The original Harris–Benedict equations published in 1918 and 1919.[1][2]
| BMR calculation for men (metric) | BMR = 66.5 + ( 13.75 x weight in kg ) + ( 5.003 x height in cm ) – ( 6.755 x age in years ) |
| BMR calculation for men (imperial) | BMR = 66 + ( 6.2 x weight in pounds ) + ( 12.7 x height in inches ) – ( 6.76 x age in years ) |
| BMR calculation for women (metric) | BMR = 655 + ( 9.563 x weight in kg ) + ( 1.850 x height in cm ) – ( 4.676 x age in years ) |
| BMR calculation for women (imperial) | BMR = 65.5 + ( 4.35 x weight in pounds ) + ( 4.7 x height in inches ) - ( 4.7 x age in years ) |
The Harris–Benedict equations revised by Roza and Shizgal in 1984.[3]
| Men | BMR = 88.362 + (13.397 x weight in kg) + (4.799 x height in cm) - (5.677 x age in years) |
| Women | BMR = 447.593 + (9.247 x weight in kg) + (3.098 x height in cm) - (4.330 x age in years) |
The 95% confidence range for men is ±210.5 kcal/day, and ±201.0 kcal/day for women.
The following table enables calculation of an individual's recommended daily kilocalorie intake to maintain current weight.[4]
| Little to no exercise | Daily kilocalories needed = BMR x 1.2 |
| Light exercise (1–3 days per week) | Daily kilocalories needed = BMR x 1.375 |
| Moderate exercise (3–5 days per week) | Daily kilocalories needed = BMR x 1.55 |
| Heavy exercise (6–7 days per week) | Daily kilocalories needed = BMR x 1.725 |
| Very heavy exercise (twice per day, extra heavy workouts) | Daily kilocalories needed = BMR x 1.9 |