Body mass index uses your height and weight to estimate whether you are underweight, overweight or about right. Medical professionals use it as a screening tool because of the minimal time and resources it takes. Healthy BMIs typically run from 18.5 to 24.9. However, since the formula cannot account for extremely muscular people, well-built individuals might not be obese even if their BMIs are higher than 25. To figure your BMI, you need to find your height and weight.
Measure your height in meters using a measuring tape and your weight in kilograms with a scale.
Square your your height in meters. For example, if you are 1.55 meters tall, you would multiply 1.55 by 1.55 to get 2.4025.
Divide your weight in kilograms by the Step 2 result to find your BMI. If you weigh 63 kilograms, divide 63 by 2.4025 to find your BMI equals 26.22.