BMI Calculator
Use this free online BMI Calculator to calculate body mass index. It works instantly in your browser, and your data never leaves your device.
About the BMI Calculator
BMI = weight in kg / height in metres squared. Enter height and weight in metric or imperial units.
Also known as: body mass index.
How to use the BMI Calculator
- Enter your values in the fields above.
- The BMI Calculator updates the result instantly as you type.
- Copy the result or change any value to compare scenarios.
Features
- Free with no signup and no daily limits
- Private: runs entirely in your browser
- Works on mobile, tablet and desktop
- Instant results with no button to press
- Clean, fast interface with no popups
Frequently asked questions
Is the BMI Calculator free to use?
Yes. The BMI Calculator is completely free with no signup, no limits on normal use and no watermark.
How accurate is this calculator?
Calculations use standard formulas with full floating point precision. Results are rounded only for display. For financial or medical decisions, confirm with a professional.
What else is this tool called?
People also search for it as body mass index. It is the same free tool.