BMI Calculator — Free Online Tool
Use BMI Calculator free online — runs entirely in your browser, no data sent to servers. No sign-up required.
Unit System
Your Measurements
About BMI
- BMI = weight (kg) / height (m)²
- BMI is a screening tool, not a diagnostic measure
- It does not account for muscle mass, age, or body composition
- Consult a healthcare professional for medical advice
Frequently Asked Questions about BMI Calculator
- Is BMI Calculator completely free to use?
- Yes, BMI Calculator is 100% free with no sign-up, no watermarks, and no usage limits.
- Is my data private?
- BMI Calculator runs entirely in your browser — no data is ever sent to our servers. Your content stays on your device.
- Does it work offline?
- Once the page has loaded, BMI Calculator works fully offline in your browser — no internet connection is required.
- How accurate are the results?
- All calculations use standard, well-established formulas and are accurate to at least 4 decimal places. Results are for guidance.
- Does BMI Calculator work on mobile and tablet?
- Yes, BMI Calculator is fully responsive and works in all modern browsers on desktop, tablet, and mobile.
This tool runs entirely in your browser. No data is ever sent to our servers.