How many pounds of pressure is in a karate kick?

There are some other factors that you need to know. What size person is this kick coming from, weight, height, strength, and distance.

A good martial artist can snap a kick out at 30 to 40 miles an hour. Focus onto a rather small area of contact can create forces in excess of 1000 pounds of pressure. The exact amount is going to vary based on the factors above.