BMI Calculator

Calculate your body mass index (BMI) with this handy, free body weight calculator tool. By calculating your body mass index, you can get an indication of whether your weight may be affecting your health. BMI is commonly used by Doctors and health professionals worldwide and is calculated using your weight and height. You have two calculators to choose from - metric and imperial.

BMI Classifications (International)

BMI of less than 18.5kg/m²

A BMI of less than 18.5 indicates that you are underweight, so you may need to put on some weight. You are recommended to ask your Doctor or a dietician for advice.

BMI of 18.5 - 25kg/m²

A BMI of 18.5 - 25 indicates that you are at a healthy weight for your height. By maintaining a healthy weight, you lower your risk of developing serious health problems.

BMI of 25 - 30kg/m²

A BMI of 25 - 30 indicates that you are slightly overweight. You may be advised to lose some weight for health reasons. You are recommended to talk to your Doctor or a dietician for advice.

BMI of over 30kg/m²

A BMI of over 30 indicates that you are heavily overweight. Your health may be at risk if you do not lose weight. You are recommended to talk to your Doctor or a dietician for advice.