BMI Calculator
Calculate body mass index with metric or imperial units. Free, private and instant.
How to use the BMI Calculator
- Enter your values in the fields above.
- The result updates automatically as you type.
- Copy or note the figures you need.
About this tool
Work out your BMI and see which NHS weight category it falls in. BMI is a screening measure and does not account for muscle mass or body composition.
BMI Calculator is part of ToolStack Hub's Calculators. It runs entirely in your browser, which keeps your data private and makes results instant. There is nothing to install, no account to create and no usage limit.
Frequently asked questions
Is the BMI Calculator free?
Yes. BMI Calculator is completely free with no sign-up, limits or watermarks.
Is my data private when I use the BMI Calculator?
Yes. It runs in your browser, so your input is not uploaded to our servers.
Does it work on mobile?
Yes. ToolStack Hub tools work on phones, tablets and desktop browsers.
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