BMR Calculator
Calculate Basal Metabolic Rate using Mifflin-St Jeor, Harris-Benedict, Katch-McArdle, and Cunningham formulas. Side-by-side comparison with food equivalents.
BMR Calculator
Calculate your Basal Metabolic Rate using four leading formulas: Mifflin-St Jeor, Harris-Benedict Revised, Katch-McArdle, and Cunningham. Compare results side by side and see what your BMR means in daily calorie equivalents.
Your Details
Optionally add body fat % for Katch-McArdle & Cunningham formulas.
Frequently Asked Questions
What is BMR?
Calories your body needs for basic functions (breathing, circulation, cell production) while completely at rest.
Which formula is most accurate?
Mifflin-St Jeor for general population. If you know body fat %, Katch-McArdle accounts for lean body mass and can be more precise.
BMR vs TDEE?
BMR = calories at rest. TDEE = BMR x activity factor = total daily calories including movement and exercise.
Is the BMR Calculator free to use?
Yes, the BMR Calculator is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.
Is my data safe with this tool?
Absolutely. The BMR Calculator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.
Does the BMR Calculator work on mobile devices?
Yes, the BMR Calculator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the BMR Calculator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
How do I use the BMR Calculator?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The BMR Calculator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About BMR Calculator
BMR Calculator is a free, browser-based tool in our Calculator Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.