Instant calculator
BMR Calculator
Use the BMR calculator to estimate the calories your body uses at rest before activity is added.
How to use
Quick steps
- Enter sex, age, weight, height (feet), height (inches).
- Review the instant answer block and supporting calculations.
- Compare the result with related tools in the same category before making a decision.
Formula
How this calculator works
Mifflin-St Jeor BMR uses sex, age, weight in kilograms, and height in centimeters
This is a planning estimate, not a clinical measurement of metabolic health.
FAQ
Common questions
How does the bmr calculator work?
It uses Mifflin-St Jeor BMR uses sex, age, weight in kilograms, and height in centimeters. Enter sex, age, weight, height (feet), and height (inches) to generate an instant estimate.
When should I use this bmr calculator?
Estimate basal metabolic rate from age, sex, height, and weight.
What should I keep in mind?
This is a planning estimate, not a clinical measurement of metabolic health.