BMR Calculator
Enter your age, sex, weight, and height. Your BMR is the baseline calories your body needs just to stay alive — before any activity.
BMR (per day)
1717.5 kcal
Per hour at rest
71.5625 kcal
How it works
Mifflin-St Jeor formula. Men: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5. Women: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age − 161. To get total daily calories, multiply BMR by your activity factor (use the TDEE calculator for that).
Frequently asked
- What is the difference between BMR and TDEE?
- BMR is calories burned at rest. TDEE is BMR plus everything else — walking, working, working out, digesting food.
- Why do men and women have different formulas?
- Men typically have more muscle mass, which burns more calories at rest. The constants in each formula reflect that average difference.
- Can I lose weight by eating below my BMR?
- Not safely for long. Eating below BMR triggers metabolic adaptation, muscle loss, and hormonal disruption. Aim for 300–700 kcal below TDEE instead.
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