A simple calculator that calculates the area of a rectangle 

This calculator calculates the area of a circle.

This body adiposity index (BAI) calculator determines your body fat percentage.Your body adiposity index is a measure of the percentage of your total body mass that is composed of fat . When using this calculator it is important to keep in mind that, although most people are typically concerned that their body adiposity index may be too high, it can also be unhealthy to have a body adiposity index that is too low. A body adiposity index classification table, displayed below provides a guideline for what body adiposity ranges are considered to be underweight, healthy, overweight, and obese.

The Waist to Hip Ratio Calculator indicates your probable health risks. People with more weight around their waist are at greater risk of lifestyle related diseases such as heart disease and diabetes than those with weight around their hips.