Example: BMI 22.9 (Healthy weight). Change the values above to calculate your own.
About the BMI Calculator
BMI compares weight to height. It's a quick screening number for adults, not a diagnosis: very muscular people can have a high BMI while being healthy.
How to use the BMI Calculator
- Enter your numbers (or keep the example).
- The result updates instantly as you type.
- Copy the result, or copy the link: it keeps your numbers so you can share them.
BMI categories for adults (WHO)
| BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Healthy weight |
| 25 – 29.9 | Overweight |
| 30 and above | Obesity |
How it's calculated
BMI = weight (kg) ÷ height (m)².
Features
- Instant resultsUpdates as you type.
- Shareable linkThe URL keeps your inputs.
- Reference tableCommon values on this page.
- Works offlineRuns in your browser.
Frequently asked questions
Is the BMI Calculator free?
Yes, the BMI Calculator is free with no sign-up, no limits and no ads covering the result.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers, and keeps working offline once the page has loaded.
Last updated · Processing happens locally in your browser.