BMR Calculator
Calculate your Basal Metabolic Rate (BMR) - the exact number of calories your body burns at rest just to stay alive.
This is the number of calories your body requires to maintain basic life functions if you were resting in bed all day.
About The BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation. Find out exactly how many calories your body burns at rest.
Unlike many free tools online, BMR Calculator runs entirely inside your browser instead of uploading your health data to a remote server. That means faster results and complete privacy, whether you're tracking fitness or wellness goals on a laptop or a phone.
How to Use
- Open the BMR Calculator tool — no sign-up or installation required.
- Enter your input or upload the required file using the tool above.
- Review the live result as it updates instantly in your browser.
- Copy, download, or export your result when you're happy with it.
Frequently Asked Questions
Is BMR Calculator free to use?
Yes. BMR Calculator is completely free, with no sign-up, no watermark, and no usage limits.
Is my data safe when I use BMR Calculator?
Yes. BMR Calculator runs entirely in your browser, so your health data stay local on your device and are never uploaded to a server.
How accurate are the results?
The calculator uses standard, widely accepted formulas. Results are estimates meant to guide your decisions and should not replace professional advice.