When covering from feet to PSI you will need to know that 1 foot head of water equals .433 psi. In the utility field and maybe other fields you maybe asked to calculate the pressure at the bottom of a column of water that extends a number of feet high. Let say you have a pipe running down from a tank that is 62 feet in the air and you are asked to calculate the pressure a the bottom of the column of water. How would you accomplish this? Very simple!!
62 x .433=26.8 or 27 PSI