BMI Calculator

About this tool

Calculate your Body Mass Index (BMI) from height and weight, in either metric (cm/kg) or imperial (inches/pounds) units, and see which weight category it falls into.

How to use it

1. Choose metric or imperial units.
2. Enter your height and weight.
3. Your BMI, weight category, and a healthy-weight range for your height are calculated instantly.

Frequently asked questions

What do the categories mean?

Under 18.5 is classified as underweight, 18.5-24.9 as normal, 25-29.9 as overweight, and 30+ as obese - the standard WHO/CDC BMI bands.

Is BMI a perfect measure of health?

No - BMI doesn't account for muscle mass, body composition, age, or sex, so it's a general screening indicator, not a diagnosis. Consult a healthcare professional for personalized advice.