BMI Calculator
Calculate your Body Mass Index from weight and height.
- 100% free
- No sign-up
- Instant results
- Privacy-friendly
About the BMI Calculator
Calculate your Body Mass Index from weight and height. The BMI Calculator on The 360 Tools is fast, accurate and completely free — no account, no downloads and no usage limits.
Like every tool in our health collection, the BMI Calculator runs directly in your browser. Your input is processed locally whenever possible, so results are instant and your data stays private.
How it works
- 1 Enter your measurements (units are switchable)
- 2 Results are computed with recognised medical formulas
- 3 Everything is calculated locally — your data never leaves the browser
Frequently asked questions
What is a healthy BMI range?
For most adults, a BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight, 25 to 29.9 is overweight, and 30 or above is classified as obese. BMI is a screening measure, not a diagnosis.
How is BMI calculated?
BMI equals weight in kilograms divided by height in metres squared (kg/m²). The calculator also accepts imperial units and converts them for you.
Is the BMI Calculator free to use?
Yes. The BMI Calculator is completely free with no sign-up, no hidden charges and no usage limits. All tools on The 360 Tools are free forever.
Is my data safe when using the BMI Calculator?
Yes. Your input is processed locally in your browser whenever possible and is never stored on our servers or shared with third parties.
Does the BMI Calculator work on mobile?
Yes. The BMI Calculator is built mobile-first and works on any modern phone, tablet or desktop browser without installing anything.
Embed this tool on your website
Add the free BMI Calculator to your own site or blog — copy the snippet below and paste it into your HTML. It's free for any website; we only ask that you keep the credit link.
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