BMI Calculator
Body mass index in metric or imperial.
🔒 Processed on your device — nothing is uploaded.
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BMI is a rough screening measure for adults and doesn’t account for muscle mass, age or body shape. Talk to a doctor for health advice.
About the BMI Calculator
Body mass index (BMI) is a quick screening number based on height and weight. Enter your measurements in metric or imperial units to see your BMI, the standard category it falls into, and the healthy weight range for your height.
When to use it
- Getting a rough idea of whether your weight is in a healthy range
- Tracking changes over time alongside other measures
- Converting between kg/cm and lb/ft while checking
- Understanding the categories doctors refer to
Tips for the best results
- BMI doesn’t distinguish muscle from fat, so athletes may read “overweight”
- Some health bodies use lower cut-offs for South Asian adults — ask your doctor
- BMI is not designed for children, pregnant women or the elderly
How to use the BMI Calculator
- Enter your numbers in the BMI Calculator.
- Results update as you type.
- Change any value to compare scenarios.
BMI Calculator FAQ
Is the BMI Calculator free?
Yes. The BMI Calculator is completely free with no sign-up, no daily limit and no watermark.
Is it safe to use the BMI Calculator with private files?
Yes. The BMI Calculator runs entirely inside your web browser, so your files and text are never uploaded to any server.
Does the BMI Calculator work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.
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