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