BMR Calculator
Find calories your body burns at rest.
Your body needs this energy at complete rest.
What Is BMR?
BMR stands for Basal Metabolic Rate. It is the number of calories your body needs to perform its most basic life-sustaining functions — breathing, circulation, cell production, and maintaining body temperature — while at complete rest. Your BMR accounts for the largest portion of your total daily calorie burn, typically 60–75% of your TDEE.
How to Use This BMR Calculator
- Enter your age, weight (kg), height (cm), and gender.
- Click "Calculate BMR" to see how many calories your body burns at rest per day.
BMR vs TDEE — What's the Difference?
BMR is how many calories you burn if you stayed in bed all day without moving. TDEE (Total Daily Energy Expenditure) adds on all the calories burned through daily movement and exercise. Your TDEE is what you should use to plan your diet — not your BMR alone.
What Affects Your BMR?
- Age: BMR decreases by roughly 2% per decade after age 20.
- Muscle mass: More muscle = higher BMR. Muscle burns more calories than fat at rest.
- Gender: Men generally have a higher BMR due to greater muscle mass.
- Body size: Taller and heavier individuals have a higher BMR.
- Hormones: Thyroid disorders and other hormonal conditions can raise or lower BMR.
⚠️ For informational purposes only. Not medical or nutritional advice.