Calculators · Free browser tool
BMI Calculator
Body-mass index & category.
Runs on your deviceNo account needed
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Calculate an adult body mass index from weight in kilograms and height in centimetres.
How to use BMI Calculator
01
Enter the values
Fill in the labelled fields using the units shown.
02
Adjust your assumptions
Check the rate, units, or period before comparing results.
03
Read the calculation
The displayed result updates when you enter valid values.
Inputs and options
| Control | Available values or units |
|---|---|
| Weight | kg · minimum 0 |
| Height | cm · minimum 0 |
What to check
BMI is a screening measure, not a diagnosis. Adult categories are not appropriate for children, pregnancy, or every body composition. A qualified clinician can interpret your result in context.
Common questions
Is BMI Calculator free?
Yes. There is no account requirement or payment step to use this tool.
Where is my input processed?
Inside your browser. This tool does not submit your input to a processing server. The hosting service still receives normal requests to load the website and its assets.
Will this work on my phone?
It is designed for current browsers on phones and computers. Available memory, file size, browser format support, and the tool’s controls determine what your device can process.