Metric conversion table.

§ 51.714 Metric conversion table. Inches Millimeters (mm) 1/4 equals 6.4 5/16 equals 7.9 3/8 equals 9.5 1/2 equals 12.7 5/8 equals 15.9 3/4 equals 19.1 7/8 equals 22.2 1 equals 25.4 1 1/4 equals 31.8 2 3/16 equals 55.6 2 4/16 equals 57.2 2 7/16 equals 61.9 2 8/16 equals 63.5 2 9/16 equals 65.1 2 11/16 equals 68.3 2 12/16 equals 69.9 2 15/16 equals 74.6 3 1/16 equals 77.8 3 3/16 equals 81.0 3 5/16 equals 84.1 3 7/16 equals 87.3 3 9/16 equals 90.5 3 13/16 equals 96.8