Question

How many atmospheric pressure on the head of human?

Answer 1

The average pressure exerted on the human body by the atmosphere is the average local atmospheric pressure. At sea level this is about 101kPa. The average weight exerted on the human body by the atmosphere is the weight of the atmosphere above an individual. This is equal to the local pressure times the surface area facing up. I have seen the surface area on the top of a human head and shoulders estimated at .1 m2. This gives a weight of 10.1 kN, or just a little over 1.1 ton.