From the air: 14.7 lbs per square inch. Now you need the number of square inches for a human body on average.
Next you may also be referring to the earth pushing back on you. That would require you to know your weight and your footprint area which would be different for different people. I'm looking at my foot and I'm guessing it has 30 sq inches, so 2 feet is 60 sq. inches. My 220 lbs spread over 60 sq. inches produces about 3.7 psi, but it is not spread over all my body area. It would be applied back onto my shoes.