Free BMR Calculator — Calculate Basal Metabolic Rate
Free BMR Calculator
Calculate your Basal Metabolic Rate — the calories your body burns at complete rest.
Understanding Your BMR
BMR stands for Basal Metabolic Rate — the calories your body would burn if you stayed in bed all day doing nothing. It is the baseline of your metabolism.
BMR is affected by:
- Body size - larger bodies burn more calories
- Muscle mass - muscle burns more than fat
- Age - BMR decreases with age
- Gender - men typically have higher BMR than women
- Hormones - thyroid function affects metabolism
Frequently Asked Questions
What is BMR?
BMR is the number of calories your body needs at complete rest to maintain vital functions like breathing, heartbeat, and cell production.
What is the difference between BMR and TDEE?
BMR is calories at complete rest. TDEE is BMR multiplied by an activity factor, giving your total daily calorie needs.
Which BMR formula is most accurate?
Mifflin-St Jeor is currently the most accurate for most people. Katch-McArdle is best if you know your body fat percentage. Harris-Benedict is the older classic formula.
What is a normal BMR?
Men: 1500-1800 kcal/day. Women: 1200-1500 kcal/day. Higher muscle mass, larger body size, and younger age all raise BMR.
Is this BMR calculator free?
Yes, completely free with no signup required.