BMI calculator

What is body mass index?

Body mass index (BMI) is a measurement that can be used to estimate if you are in the healthy weight range for your height and ethnicity. Your BMI is calculated by dividing your weight, in kilograms, by your height in metres, squared.

Use the BMI table below to see what health range you are in – but remember there are other factors that could mean your BMI is not a true indicator of healthy weight, and you may wish to discuss your results with a health professional.

Calculate your BMI
BMI result Underweight Healthy Overweight Obese
NZ European Less than 18.5 18.5 - 25 >25 - 30 Greater than 30
Maori/Pacific Islanders Less than 18.5 18.5 - 26 >26 - 32 Greater than 32

Waist circumference should ideally be less than 90cm for women and less than 100cm for men.