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BMI, BMR & Calorie Calculator
Body mass index, resting and daily energy needs, body fat from a tape measure, and a healthy weight range.
Free, no uploads, no sign-up. Runs 100% in your browser.
How BMI, BMR & Calorie Calculator works
BMI is weight divided by height squared. BMR uses the Mifflin-St Jeor formula, daily energy multiplies it by an activity level, and body fat uses the US Navy tape measure method.
How to use BMI, BMR & Calorie Calculator
- Choose units and sex.
- Enter age, height and weight.
- Pick how active you are.
- Add neck, waist and hip for body fat.
Tips
- Most watches can export FIT files from their app or website.
- Health files reveal a lot about you. Here they never leave your device.
- These tools give training information, not medical advice.
BMI, BMR & Calorie Calculator FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
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