Below are some of the commonly used imperial ( Inches) sizes converted into metric (mm ) hope it helps.
Inch - mm
1/64 - 0.39
1/16 - 1.58
1/8 - 3.17
3/16 - 4.72
¼ - 6.35
5/16 - 7.93
3/8 - 9.52
7/16 - 11.11
½ - 12.7
9/16 - 14.28
5/8 - 15.87
11/16 - 17.46
¾ - 19.00
13/16 - 20.63
7/8 - 22.22
15/16 - 23.81
1” - 25.40
Thank you.
Mattools
Anchortoolscom
tooltimez
Guide created: 25/08/08 (updated 21/09/09)


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