WHR Calculator
WHR is a 'Waist to Hip Ratio' calculator, to assess waist measurement by your hip measurement.
WHR is actually a measuring tape to determine the circumference of your hips at the widest part of your buttocks. Furthermore, you can also measure your waist at the slighter edge area of your natural waist, possibly above the belly button.
According to some research, people with "apple-shaped" bodies (with more weight around the waist) face more health risks than those with "pear-shaped" bodies who carry more weight around the hips. So here is your guide line to verify the ratio, divide your waist measurement by your hip measurement.