The BMI Calculator calculates the Body Mass Index which is a measure of obesity for adult men and women.
The BMI is calculated by dividing the body weight (in kilograms) by the height (in meters) squared (BMI = weight/height2).
Not all adults who have a BMI in the range labeled "healthy"are at their most healthy weight. They may have lots of fat but very little muscle. Similarly, if you are an athlete or exercise a lot, then you may have lots of muscle and less fat and if your BMI is more than the normal range, then it may still be healthy.
The BMI normal range is not applicable to pregnant and breast feeding mothers.