BMI Calculator
BMI, or Body Mass Index, is the most common "fatness" index used today. It is based on your weight and your height only - so someone who is a body-builder who is extremely muscular may have a high calculated BMI even though they do not have much body fat. For most of us, however, it is a good simple calculation to let us know where we stand. A BMI below 27 is considered "normal weight" (below 17 is underweight), a BMI of 27 to 30 is "overweight", and a BMI over 30 is considered "obese".
The calculator below will tell you your BMI and plot it on a graph - you cannot change your height, but you can get an estimate of what weight you would need to reach to reduce your BMI to a better number. (And you can repeat the calculation with various weights).