About this Calculator
Your Basal Metabolic Rate (BMR) represents the absolute minimum number of calories your body needs to survive while at complete rest.
Formula & Calculations
Mathematical Formula
Mifflin-St Jeor vs. Revised Harris-Benedict (1984)
Evaluates rest energy needs in a neutral environment.
How to Calculate Step-by-Step
1
Input profile
Age, gender, weight, and height.
2
Select equation
Choose MSJ or Harris-Benedict.
3
Calculate BMR
Outputs resting energy needs.
How to Use & Best Practices
Input details and choose which equation formula to run.
Frequently Asked Questions
What is the difference between BMR and RMR?
BMR requires strict waking conditions and fasting; RMR is measured without fasting.