BMI Calculator
Work out your Body Mass Index from your weight and height, and see which weight category it falls into.
Enter your details below.
How to use
- Enter your weight in kilograms.
- Enter your height in centimetres.
- Read your BMI, category, and healthy weight range.
About this tool
This tool divides your weight in kilograms by your height in metres squared to give your Body Mass Index (BMI), then places the result in a standard category: underweight, healthy, overweight, or obese. It also shows the weight range that would put you in the healthy band for your height. The result is general information only, not medical advice, and BMI does not account for muscle mass, age, or body composition.
Frequently asked questions
What is a healthy BMI?
A BMI from 18.5 to 24.9 is generally classed as the healthy range, but it is only a rough guide and does not suit every body type.
Does BMI work for athletes?
Not always — a very muscular person can have a high BMI without excess body fat, because BMI cannot tell muscle apart from fat.