BMI Calculator
Calculate Body Mass Index from weight and height, metric or imperial.
Enter your weight and height in either metric (kg/cm) or imperial (lb/in) units to get your Body Mass Index and the standard WHO weight category it falls into. BMI is a screening measure, not a diagnosis - it does not account for muscle mass, bone density, or body composition.
Runs on your device. This tool processes your file inside this browser tab. Nothing is uploaded, so it also works offline once the page has loaded, and closing the tab discards the file from memory.
Loading tool
How it works
- 01
Choose metric or imperial units.
- 02
Enter weight and height.
- 03
Read the BMI value and category.
Details
- Category
- Developer & data
- Runs
- In your browser
- Files uploaded
- No
- Cost per run
- Free
- Sign-in
- Not required
- Works offline
- Yes, once loaded
Last updated 2026-08-12
Common questions
What formula is used?
Metric: weight(kg) / height(m)^2. Imperial: weight(lb) / height(in)^2 * 703.
Is BMI accurate for everyone?
No - it's a general screening tool. Athletes with high muscle mass, older adults, and children can get misleading results. Consult a doctor for a full health assessment.
Use this from your code
This tool is also a REST endpoint, so you can run it in a pipeline instead of by hand. It is free and needs no API key. See the API reference for every parameter.
curl -X POST https://fileoven.com/api/v1/tools/bmi-calculator \
-H "Content-Type: application/json" \
-d '{"units":"metric","weight":70,"height":175}'