The Body Mass Index (BMI) is calculated by BMI = Weight (in kg) / [Height x Height] (in metres). BMI in kg/m²Weight Category* More than or equal to 30Obese 25-29.9Overweight 18.5-24.9Healthy weight Less than 18.5Underweight *According to the World Health Organization for adults aged 18-69.BMI less than 18.5 presents a risk of osteoporosis in the long term.Obesity (BMI > 30) is associated with increased cardiac risk. 24.4% of our adult population is overweight & 6% are obese. Gradual weight loss of no more than 1kg/week is encouraged using a combination of exercise as well as caloric control.