# Body Fat Calculator

0 ft & BMI Scale

BMI graph weight and height 6 ft 7 in 340 lb

How much should I weigh?

## Health problems from being overweight

Adults whose BMI is greater than 25 (overweight) or with a BMI greater than 30 (obese) have a greater risk of varied diseases and health conditions, including,:

## BMI Prime

Body Mass Index Prime is method of using the results of the BMI calculations to quickly and easily rank a person into a category. Eg:
• BMI Prime less than 0.74 = Underweight.
• BMI Prime greater than 0.74 and less than 1.00 = Optimal weight.
• BMI Prime greater than 1 = Overweight
Bmi is a variant of the Quetelet index. If you have a Prime of less than 0.74, you are underweight. If your prime is more than 0.74 and less than 1.00, your weight is ideal. If your BMI prime is more than 1 you are probably overweight.

## Do the sums

Behind the scenes of BMI
• BMI = weight(kilograms) / height2 (metres2)         (Metric Units)
• BMI = 703 . weight(pounds) / height2 (inches2)         (Imperial Units)

## BMI limitations

BMI is particularly inaccurate for people who are very fit or athletic, as their high muscle mass can classify them in the overweight category by BMI, even though their body fat percentages frequently fall in the 10-15% category, which is below that of a more sedentary person of average build who has a normal BMI number.
See wikipedia.org/wiki/Body_mass_index#Limitations for further clarification.