Reverse conversion Microns to Mil or just enter a value in the quottoquot field Please share if you found this tool useful Tweet. Unit Descriptions 1 Mil 1 mil is exactly 1 x 10-3 inches. In SI units 1 mil is 2.54 x 10-5 meters. 1 Micron 1 micro is exactly 1 x 10-6 meters. Meters are SI units.