Technical Section
  Metric to Inch Conversion Chart

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INCHES METRIC   INCHES METRIC
FRACTIONAL DECIMAL mm   FRACTIONAL DECIMAL mm
  0.0039 0.1   29/32  0.9063 23.0188
  0.0079 0.2   59/64  0.9219 23.4156
  0.0118 0.3     0.9252 23.5
  1/64 0.0156 0.3969   15/16  0.9375 23.8125
  0.0157 0.4     0.9449 24
  0.0197 0.5   61/64  0.9531 24.2094
  0.0236 0.6     0.9646 24.5
  0.0276 0.7   31/32  0.9688 24.6063
  1/32 0.0313 0.7938     0.9843 25
  0.0315 0.8   63/64  0.9844 25.0031
  0.0354 0.9   1      1 25.4
  0.0394 1     1.0039 25.5
  0.0433 1.1     1.0236 26
  3/64 0.0469 1.1906     1.0433 26.5
  0.0472 1.2     1.063 27
  0.0512 1.3     1.0827 27.5
  0.0551 1.4     1.1024 28
  0.0591 1.5     1.122 28.5
  1/16 0.0625 1.5875     1.1417 29
  0.063 1.6     1.1614 29.5
  0.0669 1.7     1.1811 30
  0.0709 1.8     1.2205 31
  0.0748 1.9   1  1/4 1.25 31.75
INCHES METRIC   INCHES METRIC
FRACTIONAL DECIMAL mm   FRACTIONAL DECIMAL mm
  5/64 0.0781 1.9844     1.2598 32
  0.0787 2     1.2992 33
  0.0827 2.1     1.3386 34
  0.0866 2.2     1.378 35
  0.0906 2.3     1.4173 36
  3/32 0.0938 2.3813     1.4567 37
  0.0945 2.4     1.4961 38
  0.0984 2.5   1  1/2 1.5 38.1
  7/64 0.1094 2.7781     1.5354 39
  0.1181 3     1.5748 40
  1/8 0.125 3.175     1.6142 41
  0.1378 3.5     1.6535 42
  9/64 0.1406 3.5719     1.6929 43
  5/32 0.1563 3.9688     1.7323 44
  0.1575 4   1  3/4 1.75 44.45
  11/64 0.1719 4.3656     1.7717 45
  0.1772 4.5     1.811 46
  3/16 0.1875 4.7625     1.8504 47
  0.1969 5     1.8898 48
  13/64 0.2031 5.1594     1.9291 49
  0.2165 5.5     1.9685 50
  7/32 0.2188 5.5563   2      2 50.8
  15/64 0.2344 5.9531     2.0079 51
  0.2362 6     2.0472 52
  1/4 0.25 6.35     2.0866 53
  0.2559 6.5     2.126 54
INCHES METRIC   INCHES METRIC
FRACTIONAL DECIMAL mm   FRACTIONAL DECIMAL mm
17/64 0.2656 6.7469     2.1654 55
  0.2756 7     2.2047 56
  9/32 0.2813 7.1438     2.2441 57
  0.2953 7.5   2  1/4 2.25 57.15
19/64 0.2969 7.5406     2.2835 58
  5/16 0.3125 7.9375     2.3228 59
  0.315 8     2.3622 60
21/64 0.3281 8.3344     2.4016 61
  0.3346 8.5     2.4409 62
  11/32 0.3438 8.7313     2.4803 63
  0.3543 9   2  1/2 2.5 63.5
23/64 0.3594 9.1281     2.5197 64
  0.374 9.5     2.5591 65
  3/8 0.375 9.525     2.5984 66
25/64 0.3906 9.9219     2.6378 67
  0.3937 10     2.6772 68
13/32 0.4063 10.3188     2.7165 69
  0.4134 10.5   2  3/4 2.75 69.85
27/64 0.4219 10.7156     2.7559 70
  0.4331 11     2.7953 71
  7/16 0.4375 11.1125     2.8346 72
  0.4528 11.5     2.874 73
29/64 0.4531 11.5094     2.9134 74
15/32 0.4688 11.9063     2.9528 75
  0.4724 12     2.9921 76
INCHES METRIC   INCHES METRIC
FRACTIONAL DECIMAL mm   FRACTIONAL DECIMAL mm
31/64 0.4844 12.3031   3      3 76.2
  0.4921 12.5     3.0315 77
  1/2 0.5 12.7     3.0709 78
  0.5118 13     3.1102 79
33/64 0.5156 13.0969     3.1496 80
17/32 0.5313 13.4938     3.189 81
  0.5315 13.5     3.2283 82
35/64 0.5469 13.8906     3.2677 83
  0.5512 14     3.3071 84
  9/16 0.5625 14.2875     3.3465 85
  0.5709 14.5     3.3858 86
37/64  0.5781 14.6844     3.4252 87
  0.5906 15     3.4646 88
19/32  0.5938 15.0813   3  1/2 3.5 88.9
39/64  0.6094 15.4781     3.5039 89
  0.6102 15.5     3.5433 90
  5/8 0.625 15.875     3.5827 91
  0.6299 16     3.622 92
41/64  0.6406 16.2719     3.6614 93
  0.6496 16.5     3.7008 94
21/32  0.6563 16.6688     3.7402 95
  0.6693 17     3.7795 96
43/64 0.6719 17.0656     3.8189 97
11/16 0.6875 17.4625     3.8583 98
  0.689 17.5     3.8976 99
INCHES METRIC   INCHES METRIC
FRACTIONAL DECIMAL mm   FRACTIONAL DECIMAL mm
45/64  0.7031 17.8594     3.937 100
  0.7087 18   4      4 101.6
23/32  0.7188 18.2563     4.3307 110
  0.7283 18.5   4  1/2 4.5 114.3
47/64  0.7344 18.6531     4.7244 120
  0.748 19   5      5 127
  3/4 0.75 19.05     5.1181 130
49/64  0.7656 19.4469     5.5118 140
  0.7677 19.5     5.9055 150
25/32  0.7813 19.8438   6      6 152.4
  0.7874 20     6.2992 160
51/64  0.7969 20.2406     6.6929 170
  0.8071 20.5     7.0866 180
13/16  0.8125 20.6375     7.4803 190
  0.8268 21     7.874 200
53/64  0.8281 21.0344   8      8 203.2
27/32  0.8438 21.4313     9.8425 250
  0.8465 21.5   10      10 254
55/64  0.8594 21.8281   20      20 508
  0.8661 22   30      30 762
  7/8 0.875 22.225   40      40 1016
  0.8858 22.5   60      60 1524
57/64  0.8906 22.6219   80      80 2032
  0.9055 23   100      100 2540
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