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.
Up to 180 pounds
There are many variations of kicks in the many different karate systems, but there are four primary kicks: front kick, round kick, side kick and back kick. These four kicks can be further categorized (eg. thrust vs. snap, high vs. low, spinning vs. straight, etc.). A practitioner can achieve "mastery" in kicking within the system with solely these four kicks .
3000 pounds of pressure they can snap a broom handle in half
You need six pounds of pressure to torque.
556 pounds
35-4500 pounds
The only way to accurately determine the amount of pounds or pressure per square inch is being delivered by any strike is to use a scale or device that registers impact. However, it is very difficult to be exact since many factors go into the principles of power, applied force as affected by reaction force, acceleration, balance, and other factors. One common method of testing the power of a kick in general is to strike an heavy object, such as a kicking bag, and measure the amount of movement, or see how many 12x12x1 (3/4 inch) pine boards you can break. This should only be attempted under the direct supervision of a qualified instructor since injury could occur.
A wide variety of karate is taught in Thailand. However, the native art is Muay Thai. It is also known as kick boxing. There are some very strong martial artist and many of the Muay Thai techniques are used in MMA.
About 14,000 pounds per square inch
A bar is a unit of pressure equal to 14.5 pounds per square inch (psi). So if you're asking for how many pounds are in 1 bar of pressure, the answer is approximately 14.5 pounds.
250 pounds per square inch.
Normally it takes 80.000 pounds of prrssure