Newtons per square meter to centimeters of water conversion calculator shown above calculates how many centimeters of water are in 'X' newtons per square meter (where 'X' is the number of newtons per square meter to convert to centimeters of water). In order to convert a value from newtons per square meter to centimeters of water (from N/m² to cmH2O) just type the number of N/m² to be converted to cmH2O and then click on the 'convert' button.