Enter values and select Calculate to see your result.
Resting Calorie Estimate
BMR estimates the energy your body uses at rest. It is an estimate, not a medical diagnosis.
How to use the BMR Calculator
Estimate basal metabolic rate with the Mifflin-St Jeor equation.
- Select the equation option.
- Enter age, weight and height.
- Calculate estimated resting energy per day.
BMR Calculator formula
BMR = 10W + 6.25H − 5A + 5 or −161, with W in kg and H in cm.
Worked example
Inputs: Male, age 30, 70 kg and 175 cm.
What to expect: The calculator estimates resting energy in kcal/day; it is not a measured metabolic test.
How to read your result
BMR excludes activity. Use an activity multiplier only for a maintenance estimate.
Frequently asked questions
Is BMR daily calories?
No. BMR is energy at rest; maintenance includes activity.
Is the sex option a medical judgment?
It selects the constants used by this equation; the output remains an estimate.