BMR Calculator
Basal Metabolic Rate — calories your body burns at complete rest
About the BMR Calculator
BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest to maintain vital functions like breathing, circulation, and cell production. It represents your body's minimum daily energy requirement and forms the foundation for calculating your total daily calorie needs. Knowing your BMR helps you set realistic calorie targets for weight loss, maintenance, or muscle gain.
How to Use
- Select your gender and enter your age in years
- Enter your weight and height (choose kg/lbs and cm/inches)
- Choose a formula — Mifflin-St Jeor is recommended for most people
- Click Calculate BMR to see your result and activity-adjusted calorie levels
Formula Used
Mifflin-St Jeor:
Men: 10W + 6.25H − 5A + 5
Women: 10W + 6.25H − 5A − 161
Harris-Benedict (revised):
Men: 88.36 + 13.4W + 4.8H − 5.68A
Katch-McArdle:
BMR = 370 + 21.6 × LBM
Men: 10W + 6.25H − 5A + 5
Women: 10W + 6.25H − 5A − 161
Harris-Benedict (revised):
Men: 88.36 + 13.4W + 4.8H − 5.68A
Katch-McArdle:
BMR = 370 + 21.6 × LBM
W = weight (kg), H = height (cm), A = age (years), LBM = Lean Body Mass (kg)
Understanding Your Results
BMR (kcal/day)
The minimum calories your body needs to sustain life at complete rest — do not eat below this number consistently.
Per Hour
Your BMR divided by 24 — useful for understanding hourly energy expenditure even during sleep and rest.
TDEE Activity Levels
Total Daily Energy Expenditure — your BMR multiplied by an activity factor ranging from Sedentary (×1.2) to Super Active (×1.9). This is your real-world calorie burn.
Medical Disclaimer
This calculator provides estimates for general informational purposes only. Results are not a substitute for professional medical advice. Consult a qualified healthcare provider for personalized guidance.