Multiply the amount in kilopascals by 0.145037738, which is a conversion constant from kilopascals to psi. As an example, 20 kPa multiplied by 0.145037738 equals 2.90075476 psi.
Check your answer by dividing the amount in kilopascals by 6.894757293, which is another constant from kilopascals to psi. In this example, 20 divided by 6.894757293 equals 2.90075475 psi.
Round the number to four decimal places. In this example, 20 kPa equals 2.9008 psi.