BMR Calculator
Calculate your basal metabolic rate with the Mifflin-St Jeor equation — 10 × weight (kg) + 6.25 × height (cm) − 5 × age, plus 5 for men or minus 161 for women. An estimate based on a population average.
Your BMR — basal metabolic rate
1,452 kcal/day
The calories your body burns at complete rest, just to stay alive — breathing, circulation, cell repair. You burn more than this in a normal day because you move.
What this means in practice
| Activity level | Daily burn (TDEE) |
|---|---|
| Sedentary (×1.2) | 1,742 kcal/day |
| Lightly active (×1.375) | 1,996 kcal/day |
| Moderately active (×1.55) | 2,250 kcal/day |
| Very active (×1.725) | 2,504 kcal/day |
| Extra active (×1.9) | 2,758 kcal/day |
Formula & source — Mifflin-St Jeor equation (Mifflin et al., 1990)
Men: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5. Women: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age − 161. Developed by Mifflin et al. (American Journal of Clinical Nutrition, 1990) and found the most accurate predictive equation in validation studies (Frankenfield et al., 2005). Individual BMR varies by roughly ±10%.
Estimate, not medical advice. FitCalc results are estimates based on population-average formulas. They are not a diagnosis, a prescription, or a substitute for professional medical advice. If you have a medical condition, are pregnant, or take medication, talk to a doctor or registered dietitian before changing your diet or exercise. FitCalc claims no medical credentials.
Try next: TDEE Calculator · Calorie Calculator · Maintenance Calorie Calculator