BMI stands for Body Mass Index. It’s a widely used way of calculating the optimum weight range for your height. BMI is calculated by dividing your weight in kilograms by your height in metres squared. It can help give you an idea of whether your weight is in the ‘Healthy’, ‘Under Weight’, ‘Overweight’ or ‘Obese’ range. Keep in mind that BMI is a guide only, and does not take into account age, ethnicity, body type, gender or body composition. BMI should not be used by those under 18, athletes or to calculate healthy weight for pregnant women. We recommend pairing your BMI with other measures such as waist circumference, body fat percentage and having your doctor check other risk factors as well. According to the National Health and Medical Research Council, a BMI of 20-25 is considered healthy for most adults.