About the bmr calculator
Basal metabolic rate is the energy your body uses at complete rest to stay alive — breathing, circulation, and cell repair. It’s the starting point for estimating daily calorie needs.
How to use this calculator
- Enter age and sex.
- Enter height and weight.
- Read your BMR from two equations.
Worked examples
- 10 × 77 + 6.25 × 178 − 5 × 35 + 5
About 1,713 kcal/day.
Measurement guidance
BMR vs. daily needs
Daily needs are higher once activity is included. Use the calorie calculator for an activity-adjusted estimate.
Frequently asked questions
Which equation is more accurate?
Mifflin–St Jeor is widely used and generally considered more accurate for most adults.
Does muscle affect BMR?
Yes — more lean mass generally raises BMR, which these formulas don’t measure directly.