BMI Calculator (Adults 18+)

Calculate your body mass index and check your weight category.

Your BMI result

0

Overweight threshold used: 25

Obese threshold used: 30

Learn what to do next

Formula: BMI = weight(kg) / height(m)²

This calculator is for adults aged 18+ and is for guidance only.

For adults, BMI uses the same formula for female and male users.

Do not use this tool if you are pregnant, under 18, have (or may have) an eating disorder, or have a condition that affects height.