About the BMR Calculator
Basal metabolic rate is the energy your body uses at rest for essential functions. This estimate uses the Mifflin–St Jeor equation from your age, sex, height, and weight. It is a general figure, not a medical measurement.
How it’s calculated
Mifflin–St Jeor: BMR = 10 × kg + 6.25 × cm − 5 × age + 5 (male) or − 161 (female).
Example calculation
A 30-year-old male, 175 cm and 75 kg, has an estimated BMR of about 1,699 calories per day.
Frequently asked questions
Is BMR the same as calories I should eat?
No — BMR is only the resting baseline. Your total daily needs are higher once activity is included, which the TDEE calculator estimates.
How accurate is this?
The Mifflin–St Jeor equation is well regarded but still an estimate; individual metabolism varies with body composition and other factors. It isn't a clinical measurement.
This tool provides a general, informational estimate only. It is not medical advice and cannot diagnose, treat, or replace guidance from a qualified healthcare professional. Individual health depends on many factors this estimate does not capture. If you have questions about your health, talk to a doctor.