Centimeters of water to torr conversion calculator shown above calculates how many torr are in 'X' centimeters of water (where 'X' is the number of centimeters of water to convert to torr). In order to convert a value from centimeters of water to torr (from cmH2O to Torr) simply type the number of cmH2O to be converted to Torr and then click on the 'convert' button.