Browser utility · No upload
BMI Calculator
Calculate Body Mass Index in metric or imperial units — free, private, and instant.
Runs locally in your browser — your input is never uploaded or stored.
About this tool
BMI Calculator lets you calculate Body Mass Index in metric or imperial units without installing an app or creating an account. See the standard adult screening category with a clear non-diagnostic health note.
Enter height and weight in metric or imperial units to see your BMI and the standard adult category, as a general screening reference.
How it works
- Enter or choose your values
- Review the instant result
- Copy or download the result
Frequently asked questions
How do I use BMI Calculator?
Enter or choose your input in the tool above. The result updates immediately or appears when you select the action, ready to copy or download.
Is BMI a diagnosis?
No. BMI is a general screening number and does not account for muscle, age, or body composition — consult a healthcare professional for medical advice.
Is BMI Calculator free, and is my data private?
Yes. BMI Calculator is free with no account or watermark, and it runs entirely in your browser so your input is never uploaded, stored, or shared.
Does it work on phones and tablets?
Yes. It works in current browsers on Android, iPhone, iPad, Windows, macOS, and Linux.