Kris Lindqvist's Powerlifting Relative Strength Calculator

As I prepare for my next round of working out, this relative strength calculator looks good.  Kris Lindqvist put it together after researching a number of methods for comparing yourself with other lifters that take into account weight, age, and sex, the big three determinants of weightlifting performance.

Kris provides a rather extensive explanation of the calculator.  An interesting point, strength relative to body weight is not a good measure of relative strength because, above almost emaciated body weights, it starts to decline.