Wouldn't a 150 pound woman on a 1/4 heel and only on the heel be 150 x 16 = 2400 not 150 x 4? as there are 16 - 1/4" squares in one square inch? Assuming she was standing on one foot. Was just curious on the math/conversion ratio on that is all. Also there are other variables such as stride length, which will determine your point of impact and it's size.

Bill I volunteer to help on the research...but you sir are wearing the heels for the first round.