BMR Calculator
Estimate your basal metabolic rate using the Mifflin-St Jeor equation, then see how that resting calorie burn scales across common activity levels.
Body Data
Enter your age, sex, and measurements. Switch between imperial and metric units whenever needed.
BMR Estimate
BMR is your resting calorie burn before activity, training, and digestion are layered on top.
Basal metabolic rate
1,783 calories/day
Estimated with the Mifflin-St Jeor equation
Sedentary
2,139 cal
Lightly active
2,451 cal
Moderately active
2,763 cal
Very active
3,075 cal
Extra active
3,387 cal
BMR vs. daily calorie needs
Your BMR is not your maintenance calories.
BMR estimates the calories your body would use lying still for a full day. Real-world maintenance calories are higher because walking, training, work, digestion, and movement all add to energy use.
That is why the results include activity-based calorie estimates in addition to your resting BMR.
Frequently Asked Questions
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