Hydrostatic force is a force that occurred in fluid static which means fluid not moving. This is often encountered in structures that interact with fluid. Pressure on the surface is immersed in the fluid, depending on to the finite depth of fluid. Hydrostatic force is influenced by the cross-sectional area of the system, because of the presence of the cross section, causing the fluid pressure interact. So, a resultant force acting on the surrounding cross-section. To determine the effectiveness of this measurement tool, some variations was conducted; load, arm length, the height remains fluid, and the angle. Testing using these variations will find error percentage < 5%, which the results obtained from comparing theoretical calculations and actual experiments, which were validated. Existence % error produced in calculation, due to, the accuracy at the time of variable readings, and also the use of angles that do not have the precision parameter.