Stoneybridge reference library

Imperial - Metric conversion lookup tables.

INCH - MM
Inch MM 16ths MM 32nds MM 64ths MM
1/8 3.175 1 1.587 1 0.794 1 0.397
1/4 6.350 3 4.762 3 2.381 3 1.191
3/8 9.525 5 7.937 5 3.969 5 1.984
1/2 12.700 7 11.112 7 5.556 7 2.778
5/8 15.875 9 14.287 9 7.144 9 3.572
3/4 19.050 11 17.462 11 8.731 11 4.366
7/8 22.225 13 20.637 13 10.319 13 5.159
1 24.400 15 23.812 15 11.906 15 5.953
17 13.494 17 6.747
19 15.081 19 7.541
21 16.669 21 8.334
23 18.256 23 9.128
25 19.844 25 9.922
27 21.431 27 10.716
29 23.019 29 11.509
31 24.606 31 12.303
33 13.097
35 13.891
37 14.684
39 15.478
41 16.272
43 17.066
45 17.859
47 18.653
49 19.447
51 20.241
53 21.034
55 21.828
57 22.622
59 23.416
61 24.209
63 25.003
MM - INCH
MM INCH
1 0.03937
2 0.07874
3 0.11811
4 0.15748
5 0.19685
6 0.23622
7 0.27559
8 0.31496
9 0.35433
10 0.39370

This list of equivalents has been checked with a callibrated Mitutoyo digital vernier.

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