1 mm = 0.039 in 2 = 0.079 3 = 0.118 4 = 0.157 5 = 0.197 6 = 0.236 7 = 0.276 8 = 0.315 9 = 0.354 10 = 0.394
In 1958 the United States and countries of the Commonwealth of Nations defined the length of the international inch (in) is to be exactly 25.4 millimeters (mm) . This Online Conversion Calculator converts in both directions.