BMI Calculator

Calculate your Body Mass Index in metric or imperial units.

No signup requiredAlways free to use256-bit secureNever leaves your device
cm
kg

Your BMI

24.2

Normal
1518.5253040
BMI RangeCategory
< 18.5Underweight
18.5 – 24.9Normal
25 – 29.9Overweight
30+Obese

Disclaimer: BMI is a screening tool, not a diagnostic measure. It does not account for muscle mass, bone density, age, sex, or body composition. Consult a qualified healthcare professional for personalised health advice.

How it works

1. Upload

Select or drag your file onto the upload area.

2. Process

Your file is processed instantly — nothing is stored.

3. Download

Download your result with one click. Done.

Why Criply

Private by default

Client-side tools never upload your files. Server-side tools delete them immediately after processing.

No account needed

Just upload and go. No email, no password, no account — ever.

Works on any device

Fully browser-based. Works on desktop, tablet, and mobile with nothing to install.

Frequently asked questions

BMI (Body Mass Index) is a value derived from weight and height: BMI = weight(kg) ÷ height(m)². In imperial units: BMI = (weight(lbs) × 703) ÷ height(inches)². It was developed by mathematician Adolphe Quetelet in 1832 as a population-level screening tool.

Related tools

Calculate BMI (Body Mass Index) in metric (cm/kg) or imperial (ft, in/lbs) units. Shows your BMI value, category (underweight, normal, overweight, obese), and position on a visual scale bar. Includes a reference table and a disclaimer about BMI's limitations. Free, no signup, runs in your browser.