How to use the BMR Calculator
- Enter age and gender
- Enter height and weight
- See your BMR by formula
About this tool
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor, Harris-Benedict and Katch-McArdle formulas. BMR Calculator is part of ToolNest's collection of free health & fitness. It works instantly in your browser with no account and no installation.
Frequently asked questions
Is the BMR Calculator free to use?
Yes. BMR Calculator on ToolNest is completely free, with no sign-up, no watermark and no daily limits.
How accurate is the BMR Calculator?
BMR Calculator uses standard, widely accepted formulas and calculates instantly as you type. Results are for general information — for important medical decisions, please confirm with a qualified professional or your institution.
Is my data saved anywhere?
No. Everything you enter stays in your browser. Nothing is sent to or stored on our servers.
Does BMR Calculator work on mobile phones?
Yes. ToolNest works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux. There is nothing to install.