Measurement calculator that can be used to convert Pixels to Millimeters, among others: 1 Pixels [px] = 0.264 583 333 333 33 Millimeters [mm]
Convert Pixels to Millimeters:Choose the right category from the selection list, in this case 'Font size (CSS)'. Next enter the value you want to convert. From the selection list, choose the unit that corresponds to the value you want to convert, in this case 'Pixels [px]'. Finally choose the unit you want the value to be converted to, in this case 'Millimeters [mm]'.