Now, what about hydrostatic pressure? What exactly is hydrostatic pressure? Well, hydrostatic pressure is slightly easier to actually explain because hydrostatic pressure is nothing more than fluid pressure. So whenever a liquid actually travels through some type of conduit, through some type of pipe, the individual liquid molecules actually collide with the walls of that conduit with the walls of that pipe. Now, when each individual liquid molecule collides with the wall, it exerts a force. And if we sum up all the individual forces that the liquid molecules exert and divided by the surface area of the wall of the conduit on which those forces actually act on, then we obtain the fluid pressure, also known as hydrostatic pressure.