The upper limit for the punching force of a human hand is theoretically set at 50 kilonewtons. This amount of force is equal to the impact of 5,000 kilograms or 2,000 5-lb. bags of potatoes simultaneously dropping to the ground. A punching force that exceeds 50 kilonewtons will break the bones of the arm.
Several studies have been conducted to determine the peak punching force of different groups of people. Olympic boxers average around 447 to 1,066 lbs. of force while elite boxers average around 776 lbs. of force. Professional boxers punch twice as hard as amateur boxers. Martial artists pack less punch force, averaging at 325 lbs. and peaking at 412 lbs.