Calculators
BMI Calculator
Calculate Body Mass Index from height and weight, in metric or imperial.
Calculators
Calculate your BMI
This BMI calculator works out Body Mass Index, a simple screening figure that relates weight to height, and shows which standard category it falls into. Enter your height and weight in metric or imperial units.
How to calculate BMI
Choose your unit system, enter height and weight, and the BMI value and category appear.
BMI is a general screening number only. It does not account for muscle mass, body composition, age or other factors, and it is not a diagnosis. Speak to a healthcare professional about what is right for you.
Frequently asked questions
Why is BMI limited?
It uses only height and weight, so it can misjudge very muscular people and does not show where fat is carried. It is a starting point, not a full picture of health.