a litle math..

[techker]

hey guys i have a math prob here..

 

i need to do a body fat calculator..

 

i have the number

 

Body Fat Formula For Men

Factor 1 (Total body weight x 1.082) + 94.42

Factor 2 Waist measurement x 4.15

Lean Body Mass Factor 1 - Factor 2

Body Fat Weight Total bodyweight - Lean Body Mass

Body Fat Percentage (Body Fat Weight x 100) / total bodyweight

 

i need to put it in a form like here  http://www.bmi-calculator.net/body-fat-calculator/

 

i have no clue how to do math with php?

 

sorry i found it in javascript.

 

http://javascript.about.com/library/blfat2.htm

 

thx anyways..