Question: 1 psi equals to how many psig?
Answer: The answer is 1. We assume you are converting between pound/square inch and pound/square inch [gauge]. You can view more details on each measurement unit: psi or psig The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00014503773800722 psi, or 0.00014503773800722 psig.