Body Fat Testing

Can anyone point me to the best method for body fat testing using calipers? I am using Lange calipers on males from 23-35 yrs old. Basically, it needs to be fairly fast and easy. How many sites, which sites, what formula? The boys at work are having a body fat loss contest and we have access to the calipers. Any help would be appreciated.

Check out this T-nation article.

I’ve been using a Tanita Scale. It measures my weight as well as bodyfat. It’s easy to use, you just stand there, and it is accurate. It has setting for up to four people as well as an athletic mode.
I highly recommend it. T-Nation should do a review of it.