Gigabars to centimeters of water converter above calculates how many centimeters of water are in 'X' gigabars (where 'X' is the number of gigabars to convert to centimeters of water). In order to convert a value from gigabars to centimeters of water (from Gbar to cmH2O) simply type the number of Gbar to be converted to cmH2O and then click on the 'convert' button.