How does one calculate the pressure within a massive body at a certain depth? I've tried to look up some information on this and found this entry for "Lithostatic pressure" on wikipedia:

http://en.wikipedia.org/wiki/Lithostatic_pressure

Unfortunately, I do not understand the terms in that article well enough to apply the formula it provides.

Would anyone in this forum be willing to elaborate on relationship or provide links to other sources? How could this pressure be calculate for a simple example... the pressure at a specified depth for a body with a uniform density throughout?