BMI Calculator

Enter your height and weight in metric or imperial units. Get your BMI value, category (Underweight/Normal/Overweight/Obese), and a visual gauge.

Height (cm)

Weight (kg)

How to use BMI Calculator

Calculate Body Mass Index with a color-coded gauge.

Choose metric (cm/kg) or imperial (ft/lbs) units.

Enter your height and weight.

Your BMI, category (Underweight / Normal / Overweight / Obese), and a colour-coded gauge appear instantly.

Is BMI Calculator free to use?

Yes, BMI Calculator is 100% free with no account required and no usage limits.

Is my data private?

Yes. Processing happens entirely in your browser. We never see, store, or transmit your input data.

How accurate is the BMI Calculator?

Calculations use standard mathematical formulas and JavaScript's native number precision. Results are accurate for everyday use.

Can I use BMI Calculator on my mobile phone?

Yes. The tool is fully responsive and works on any modern smartphone or tablet.