BMR Calculator
Your Basal Metabolic Rate is the energy your body needs at complete rest. Compare the three most widely used prediction equations side by side.
Mifflin-St Jeor BMR
1,649 kcal/day
Harris-Benedict BMR
1,696 kcal/day
How to Use the BMR Calculator
- Enter your sex, age, height and weight.
- Optionally add body fat percentage to unlock the Katch-McArdle result.
- Compare your Mifflin-St Jeor, Harris-Benedict revised and Katch-McArdle BMR estimates.
Formulas Used
Mifflin-St Jeor (men): 10×kg + 6.25×cm − 5×age + 5
Mifflin-St Jeor (women): 10×kg + 6.25×cm − 5×age − 161
Harris-Benedict revised (men): 88.362 + 13.397×kg + 4.799×cm − 5.677×age
Harris-Benedict revised (women): 447.593 + 9.247×kg + 3.098×cm − 4.330×age
Katch-McArdle: 370 + 21.6 × lean mass (kg)
Frequently Asked Questions
What is the difference between BMR and TDEE?
BMR covers only resting functions like breathing and cell repair. TDEE multiplies BMR by an activity factor to include movement, exercise and digestion, giving your true daily calorie burn.
Which BMR equation is most accurate?
Mifflin-St Jeor is generally closest for the general population. Katch-McArdle is more accurate if you know your body fat percentage because it works from lean mass directly.
Can I raise my BMR?
Yes. Building muscle through resistance training raises resting metabolism, since lean tissue burns more energy than fat even while you sleep.
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