Megabars to inches of water converter on this page calculates how many inches of water are in 'X' megabars (where 'X' is the number of megabars to convert to inches of water). In order to convert a value from megabars to inches of water (from Mbar to inH2O) simply type the number of Mbar to be converted to inH2O and then click on the 'convert' button.