BMR Calculator (Basal Metabolic Rate)
Find your Basal Metabolic Rate — the energy your body burns at complete rest — from two trusted formulas.
How to use the bmr calculator
- Enter your age, sex, height and weight.
- Click Calculate.
- Multiply BMR by an activity factor, or use the TDEE calculator, for daily needs.
Why BMR matters for nutrition
BMR is the foundation of any calorie target. Knowing it tells you the minimum your body needs and anchors your maintenance, cut and bulk calorie levels.
Frequently asked questions
What is the difference between BMR and TDEE?
BMR is the calories you burn at rest. TDEE adds the energy from daily activity and exercise on top, so it is always higher than BMR.
Which BMR formula should I trust?
Mifflin-St Jeor is generally the most accurate for modern populations. Harris-Benedict is shown for comparison.
Related tools
TDEE Calculator
Calculate the calories you burn per day (your TDEE) to set targets for cutting, maintaining, or bulking.
Macro Calculator
Turn your calorie target into daily protein, carbohydrate, and fat goals based on your objective.
Calorie Deficit Calculator
Turn a goal weight and timeframe into the daily calories and deficit you need to hit it.