BMR Calculator
Explore an estimate of the energy your body uses at rest, with clear assumptions and flexible units.
YOUR DETAILS
A few details. A clearer estimate.
YOUR ESTIMATE
BMR Calculator
Enter your details and confirm the scope to see your estimate.
Although commonly called a BMR calculator, Mifflin–St Jeor estimates resting energy expenditure, not laboratory-measured basal metabolism. It is not a diet prescription and may not apply to illness or unusual body composition. Population applicability requires clinical review.
Only on your device. Your entries and results are not saved or sent.
How it works, sources & review details
Assumptions and limitations
Resting energy (kcal/day) = 10 × weight (kg) + 6.25 × height (cm) − 5 × age (years) + 5 for the male coefficient, or −161 for the female coefficient. Displayed to the nearest whole kcal.
Review draft limited to ages 19–78, the source study age range, height 100–250 cm and weight 20–400 kg. Measurement bounds are engineering checks.
Although commonly called a BMR calculator, Mifflin–St Jeor estimates resting energy expenditure, not laboratory-measured basal metabolism. It is not a diet prescription and may not apply to illness or unusual body composition. Population applicability requires clinical review.
Sources
Optional next step
You can read about General Medicine or contact the hospital. No result or measurement is shared through these links. Contact does not confirm an appointment.
Review record
JH-002 · Version 0.1.0 · Clinical review: approved
Reviewer: Project owner (approval confirmed in chat) · Review date: 2026-11-07
Educational information only. Not a diagnosis or treatment recommendation.