What force can break and egg shell?

The force required to break an eggshell is approximately 20 Newtons. This force is equivalent to roughly 2 kilograms (or about 4.5 pounds) of weight applied to the shell. The force could be due to a direct impact, such as dropping the egg, or from indirect pressure, such as squeezing it with your hand. Ultimately, the amount of force needed to break an egg shell varies depending on the thickness of the shell, the size of the egg, and the point at which the force is applied.