Health
BMI Calculator
Check body mass index from height and weight.
BMI is a rough screening figure, not a diagnosis.
About BMI Calculator
BMI Calculator is a free tool from Compile Labs, part of the Health collection. Check body mass index from height and weight. It runs entirely in your browser: nothing you enter is uploaded, and there is no sign-up.
This page belongs to the Health category. Simple calculators for tracking body and energy numbers. Like the rest of the site, it is designed to load quickly and stay simple to use on desktop and mobile.
How to use it
Enter your details
Provide the values the calculator asks for, such as height, weight or activity level, using the units shown.
Review the result
Read the figure the tool returns along with any note on what it means. Treat it as one input among several.
Adjust and compare
Change the inputs to see how the result moves. The numbers are estimates, not a diagnosis or medical advice.
Frequently asked questions
Is this medical advice?
No. These calculators give general estimates only and are not a substitute for advice from a qualified professional.
Is my health data private?
Yes. Everything is calculated in your browser and never leaves your device.
Do I need an account?
No. There is no sign-up and the calculators are free to use.