Your basal metabolic rate is the energy your body uses just to stay alive — breathing, circulation, cell repair. It is the foundation for any calorie target.
How it works
- Select your sex, age, weight, and height.
- The engine processes the Mifflin-St Jeor formula securely.
- Read your BMR, which is the exact number of resting calories burned daily.
Frequently asked questions
BMR vs TDEE?
BMR is at rest only. TDEE multiplies BMR by your activity level — it is the number to use for diet planning.
Why Mifflin-St Jeor and not Harris-Benedict?
Studies show Mifflin-St Jeor predicts measured metabolic rates more accurately for most modern adults.
Can I raise my BMR?
Muscle tissue burns more at rest than fat, so resistance training nudges BMR up over time.