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Decimal and Millimeter Equivalents
of Fractional Parts of an Inch
   Inches  Inches  mm    Inches  Inches   mm
  1-64 0.01563 0.397   33-64 0.51563 13.097
1-32   0.03125 0.794 17-32   0.53125 13.494
  3-64 0.04688 1.191   35-64 0.54688 13.890
1-16   0.0625 1.587 9-16   0.5625 14.287
  5-64 0.07813 1.984   37-64 0.57813 14.684
3-32   0.09375 2.381 19-32   0.59375 15.081
  7-64 0.10938 2.778   39-64 0.60938 15.478
1-8   0.125 3.175 5-8   0.625 15.875
  9-64 0.14063 3.572   41-64 0.64063 16.272
5-32   0.15625 3.969 21-32   0.65625 16.669
  11-64 0.17188 4.366   43-64 0.67188 17.065
3-16   0.1875 4.762 11-16   0.6875 17.462
  13-64 0.20313 5.159   45-64 0.70313 17.859
7-32   0.21875 5.556 23-32   0.71875 18.256
  15-64 0.23438 5.953   47-64 0.73438 18.653
1-4   0.25 6.350 3-4   0.75 19.050
  17-64 0.26563 6.747   49-64 0.76563 19.447
9-32   0.28125 7.144 25-32   0.78125 19.844
  19-64 0.29688 7.541   51-64 0.79688 20.240
5-16   0.3125 7.937 13-16   0.8125 20.637
  21-64 0.32813 8.334   53-64 0.82813 21.034
11-32   0.34375 8.731 27-32   0.84375 21.431
  23-64 0.35938 9.128   55-64 0.85938 21.828
3-8   0.375 9.525 7-8   0.875 22.225
  25-64 0.39063 9.922   57-64 0.89063 22.622
13-32   0.40625 10.319 29-32   0.90625 23.019
  27-64 0.42188 10.716   59-64 0.92188 23.415
7-16   0.4375 11.113 15-16   0.9375 23.812
  29-64 0.45313 11.509   61-64 0.95313 24.209
15-32   0.46875 11.906 31-32   0.96875 24.606
  31-64 0.48438 12.303   63-64 0.98438 25.003
1-2   0.5 12.700 1   1.00000 25.400