BMR Calculator (Basal Metabolic Rate)
Basal metabolic rate (BMR) is roughly the number of calories your body needs at complete rest just to keep functioning. Enter your details below using the Mifflin-St Jeor equation.
This tool is for general informational purposes only and is not medical advice. It does not diagnose, treat, or replace consultation with a qualified healthcare provider.
What this tool does
Basal metabolic rate (BMR) is roughly the number of calories your body needs at complete rest just to keep functioning. Enter your details below using the Mifflin-St Jeor equation.
Formula used
Mifflin-St Jeor equation: men = 10W + 6.25H - 5A + 5; women = 10W + 6.25H - 5A - 161, where W is weight in kg, H is height in cm and A is age in years. This is the estimation formula most widely recommended in current clinical nutrition guidance.
Frequently asked questions
How accurate is this?
The Mifflin-St Jeor equation is a population-level estimate; individual metabolism varies with muscle mass, genetics and health conditions.
What is BMR used for?
BMR is the starting point for estimating total daily energy needs - see the TDEE calculator to add activity level on top of it.
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