The amount of fat, but more importantly, where in your body that fat is stored can impact your health. If you have most of the body fat around the waist, you have an increased risk of high blood pressure, heart disease, diabetes and stroke compared with having the same amount of body fat around the hips and thighs.
A common measure of fat distribution is the waist-to-hip (WTH) ratio. It is calculated by dividing the circumference of your waist by the circumference of your hips.
The waist-to-hip ratio, in some case, can be a better indicator of mortality risks than body mass index (BMI). You could possibly have too large of a waist, even though your BMI indicates a healthy weight. On the other hand, if you are muscular, a BMI may indicate an unhealthy weight.