BMR Calculator
Calculate your Basal Metabolic Rate and estimate how many calories your body uses each day.
Discover your body's daily energy needs.
Estimate resting calories and daily energy expenditure using the Mifflin–St Jeor equation.
Your measurements
Adjust your profile to update results instantly.
Total Daily Energy Expenditure
Estimated calories needed per day to maintain your current weight at the selected activity level.
Resting energy
1,649
Activity allowance
907
Activity comparison
Estimated daily calories across activity levels.
What your results mean
These numbers estimate daily energy expenditure. They are not a health score or diagnosis.
Basal Metabolic Rate
1,649 kcal/day
Estimated energy your body uses at rest for essential functions. This is not your recommended daily food intake.
Total Daily Energy Expenditure
2,556 kcal/day
Your estimated maintenance calories based on the selected activity level.
Resting energy share
65%
The estimated share of total daily energy represented by resting metabolism. A higher or lower percentage is not inherently better.
What can you do next?
Select a goal to see an illustrative daily calorie starting point.
Illustrative daily calorie target
2,556
kcal/day
Begin near your estimated maintenance intake. Compare your average weight trend over 2–4 weeks.
These are general estimates for adults, not personalized medical advice. Calorie needs can differ significantly. Pregnancy, breastfeeding, certain medical conditions, and eating-disorder history require individualized guidance. Avoid using this estimate as a rigid target.
How is BMR calculated?
BMR uses the Mifflin–St Jeor equation. For males: 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5. For females, replace +5 with −161. TDEE is estimated by multiplying BMR by an activity factor.
These are population-based estimates, not direct measurements. Individual needs vary with body composition, health, and activity. This calculator is intended for adults.