Millimeters of mercury to kilobars conversion calculator above calculates how many kilobars are in 'X' millimeters of mercury (where 'X' is the number of millimeters of mercury to convert to kilobars). In order to convert a value from millimeters of mercury to kilobars (from mmHg to kbar) simply type the number of mmHg to be converted to kbar and then click on the 'convert' button.