All Tools VerseCalculate BMI - Body Mass Index and Range
Calculate your BMI and health category instantly. Free, offline, client-side - your data stays in your browser. Metric and imperial.
- Runs in your browser
- Nothing uploaded
- Free, no sign-up
Find your Body Mass Index from your height and weight, in metric or imperial units. See your category on a clear scale and the healthy weight range for your height. Everything runs in your browser.
How to Use Calculate BMI - Body Mass Index and Range
- Choose your units. Pick metric for centimetres and kilograms, or imperial for feet, inches and pounds.
- Enter your height and weight. Type the values in the chosen units.
- Read your BMI. The number appears at the top with your category, and a marker shows where you fall on the BMI scale.
- Check the healthy range. The tool shows the weight range that would put you in the normal category for your height.
- Save it. Print a clean copy or copy a share link with your numbers.
Frequently Asked Questions
How is BMI calculated?
BMI is your weight in kilograms divided by the square of your height in metres. For imperial units the tool converts feet, inches and pounds to metric first, so the result is the same.
What do the categories mean?
For adults, a BMI under 18.5 is underweight, 18.5 to 24.9 is normal weight, 25 to 29.9 is overweight, and 30 or more is in the obesity range.
Is BMI accurate for everyone?
BMI is a simple screening number, not a full health check. It does not separate muscle from fat, so very muscular people may read high, and it is not meant for children or pregnancy. Treat it as a rough guide.
What is a healthy weight for my height?
The tool shows the weight range that gives a normal BMI for your height, between about 18.5 and 24.9. It is a guide, not a target for any individual.
Is my information sent anywhere?
No. Everything runs in your browser. Your height and weight never leave your computer and the tool works offline once loaded.
Is this medical advice?
No. BMI is for general guidance only. For advice about your weight and health, speak with a doctor or qualified professional.
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