[header] How to calculate buoyancy [title] Find the volume of the submerged portion of the object. [step] The force of buoyancy that acts on an object is directly proportional to the volume of the object that is submerged. In other words, the more of a solid object that is submerged, the greater the force of buoyancy that acts on it.
This means that even objects that sink in liquid have a buoyancy force pushing upwards on them. To begin to calculate the buoyancy force acting on an object, your first step should generally be to determine the volume of the object that is submerged in fluid.