Inches of water to kips per square inch converter above calculates how many kips per square inch are in 'X' inches of water (where 'X' is the number of inches of water to convert to kips per square inch). In order to convert a value from inches of water to kips per square inch (from inH2O to ksi) simply type the number of inH2O to be converted to ksi and then click on the 'convert' button.