Inches to Centimeters
1 Inch = 2.54 cm
Multiply number of inches by 2.54 to get length in centimeters.
2.54 x inches = cm
example
2.54 x 10 inches = 25.4 cm

Centimeters to Inches
1 cm = 0.3937 inch
Multiply the number of cm by 0.3937 to get length in inches.
0.3937 x cm = inches
example
0.3937 inches x 6 cm = 2.362 inches

Inches to Millimeters
Multiply number of inches by 25.4 to get length in millimeters.
25.4 x in = mm
example
25.4 x 0.25 inch = 6.35 mm

Millimeters to Inches
Multiply number of millimeters by .03937 to get length in inches.
0.03937 x mm = inches
example
0.03937 x 10 mm = .3937 inches

 

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Fractions to Decimal and Millimeter
  fraction decimal mm   fraction decimal mm   fraction decimal mm  
  1/64 0.0156 0.3969   1 1/64 1.0156 25.7969   2 1/64 2.0156 51.1969  
  1/32 0.0313 0.7938   1 1/32 1.0313 26.1938   2 1/32 2.0313 51.5938  
  3/64 0.0469 1.1906   1 3/64 1.0469 26.5906   2 3/64 2.0469 51.9906  
  1/16 0.0625 1.5875   1 1/16 1.0625 26.9875   2 1/16 2.0625 52.3875  
  5/64 0.0781 1.9844   1 5/64 1.0781 27.3844   2 5/64 2.0781 52.7844  
  3/32 0.0938 2.3813   1 3/32 1.0938 27.7813   2 3/32 2.0938 53.1813  
  7/64 0.1094 2.7781   1 7/64 1.1094 28.1781   2 7/64 2.1094 53.5781  
  1/8 0.1250 3.1750   1 1/8 1.1250 28.5750   2 1/8 2.1250 53.9750  
  9/64 0.1406 3.5719   1 9/64 1.1406 28.9719   2 9/64 2.1406 54.3719  
  5/32 0.1563 3.9688   1 5/32 1.1563 29.3688   2 5/32 2.1563 54.7688  
  11/64 0.1719 4.3656   1 11/64 1.1719 29.7656   2 11/64 2.1719 55.1656  
  3/16 0.1875 4.7625   1 3/16 1.1875 30.1625   2 3/16 2.1875 55.5625  
  13/64 0.2031 5.1594   1 13/64 1.2031 30.5594   2 13/64 2.2031 55.9594  
  7/32 0.2188 5.5563   1 7/32 1.2188 30.9563   2 7/32 2.2188 56.3563  
  15/64 0.2344 5.9531   1 15/64 1.2344 31.3531   2 15/64 2.2344 56.7531  
  1/4 0.2500 6.3500   1 1/4 1.2500 31.7500   2 1/4 2.2500 57.1500  
  17/64 0.2656 6.7469   1 17/64 1.2656 32.1469   2 17/64 2.2656 57.5469  
  9/32 0.2813 7.1438   1 9/32 1.2813 32.5438   2 9/32 2.2813 57.9438  
  19/64 0.2969 7.5406   1 19/64 1.2969 32.9406   2 19/64 2.2969 58.3406  
  5/16 0.3125 7.9375   1 5/16 1.3125 33.3375   2 5/16 2.3125 58.7375  
  21/64 0.3281 8.3344   1 21/64 1.3281 33.7344   2 21/64 2.3281 59.1344  
  11/32 0.3438 8.7313   1 11/32 1.3438 34.1313   2 11/32 2.3438 59.5313  
  23/64 0.3594 9.1281   1 23/64 1.3594 34.5281   2 23/64 2.3594 59.9281  
  3/8 0.3750 9.5250   1 3/8 1.3750 34.9250   2 3/8 2.3750 60.3250  
  25/64 0.3906 9.9219   1 25/64 1.3906 35.3219   2 25/64 2.3906 60.7219  
  13/32 0.4063 10.3188   1 13/32 1.4063 35.7188   2 13/32 2.4063 61.1188  
  27/64 0.4219 10.7156   1 27/64 1.4219 36.1156   2 27/64 2.4219 61.5156  
  7/16 0.4375 11.1125   1 7/16 1.4375 36.5125   2 7/16 2.4375 61.9125  
  29/64 0.4531 11.5094   1 29/64 1.4531 36.9094   2 29/64 2.4531 62.3094  
  15/32 0.4688 11.9063   1 15/32 1.4688 37.3063   2 15/32 2.4688 62.7063  
  31/64 0.4844 12.3031   1 31/64 1.4844 37.7031   2 31/64 2.4844 63.1031  
  1/2 0.5000 12.7000   1 1/2 1.5000 38.1000   2 1/2 2.5000 63.5000  
  33/64 0.5156 13.0969   1 33/64 1.5156 38.4969   2 33/64 2.5156 63.8969  
  17/32 0.5313 13.4938   1 17/32 1.5313 38.8938   2 17/32 2.5313 64.2938  
  35/64 0.5469 13.8906   1 35/64 1.5469 39.2906   2 35/64 2.5469 64.6906  
  9/16 0.5625 14.2875   1 9/16 1.5625 39.6875   2 9/16 2.5625 65.0875  
  37/64 0.5781 14.6844   1 37/64 1.5781 40.0844   2 37/64 2.5781 65.4844  
  19/32 0.5938 15.0813   1 19/32 1.5938 40.4813   2 19/32 2.5938 65.8813  
  39/64 0.6094 15.4781   1 39/64 1.6094 40.8781   2 39/64 2.6094 66.2781  
  5/8 0.6250 15.8750   1 5/8 1.6250 41.2750   2 5/8 2.6250 66.6750  
  41/64 0.6406 16.2719   1 41/64 1.6406 41.6719   2 41/64 2.6406 67.0719  
  21/32 0.6563 16.6688   1 21/32 1.6563 42.0688   2 21/32 2.6563 67.4688  
  43/64 0.6719 17.0656   1 43/64 1.6719 42.4656   2 43/64 2.6719 67.8656  
  11/16 0.6875 17.4625   1 11/16 1.6875 42.8625   2 11/16 2.6875 68.2625  
  45/64 0.7031 17.8594   1 45/64 1.7031 43.2594   2 45/64 2.7031 68.6594  
  23/32 0.7188 18.2563   1 23/32 1.7188 43.6563   2 23/32 2.7188 69.0563  
  47/64 0.7344 18.6531   1 47/64 1.7344 44.0531   2 47/64 2.7344 69.4531  
  3/4 0.7500 19.0500   1 3/4 1.7500 44.4500   2 3/4 2.7500 69.8500  
  49/64 0.7656 19.4469   1 49/64 1.7656 44.8469   2 49/64 2.7656 70.2469  
  25/32 0.7813 19.8438   1 25/32 1.7813 45.2438   2 25/32 2.7813 70.6438  
  51/64 0.7969 20.2406   1 51/64 1.7969 45.6406   2 51/64 2.7969 71.0406  
  13/16 0.8125 20.6375   1 13/16 1.8125 46.0375   2 13/16 2.8125 71.4375  
  53/64 0.8281 21.0344   1 53/64 1.8281 46.4344   2 53/64 2.8281 71.8344  
  27/32 0.8438 21.4313   1 27/32 1.8438 46.8313   2 27/32 2.8438 72.2313  
  55/64 0.8594 21.8281   1 55/64 1.8594 47.2281   2 55/64 2.8594 72.6281  
  7/8 0.8750 22.2250   1 7/8 1.8750 47.6250   2 7/8 2.8750 73.0250  
  57/64 0.8906 22.6219   1 57/64 1.8906 48.0219   2 57/64 2.8906 73.4219  
  29/32 0.9063 23.0188   1 29/32 1.9063 48.4188   2 29/32 2.9063 73.8188  
  59/64 0.9219 23.4156   1 59/64 1.9219 48.8156   2 59/64 2.9219 74.2156  
  15/16 0.9375 23.8125   1 15/16 1.9375 49.2125   2 15/16 2.9375 74.6125  
  61/64 0.9531 24.2094   1 61/64 1.9531 49.6094   2 61/64 2.9531 75.0094  
  31/32 0.9688 24.6063   1 31/32 1.9688 50.0063   2 31/32 2.9688 75.4063  
  63/64 0.9844 25.0031   1 63/64 1.9844 50.4031   2 63/64 2.9844 75.8031  
  1 1.0000 25.4000   2 2.0000 50.8000   3 3.0000 76.2000  
 
 

Wire Gauge Reference: (American Wire Standard)

millimeter decimal closest fractional inch
5mm 0.20" 1/5"
6mm 0.24" 1/4"
8mm 0.31" 5/16"
10mm 0.39 between 3/8 & 7/16"
12mm 0.47" between 7/16 & 1/2"
14mm 0.55" between 1/2 & 9/16"
16mm 0.63" 5/8"
18mm 0.71" between 5/8 & 3/4"
20mm 0.79" between 3/4 & 13/16"
22mm 0.87" 7/8"
24mm 0.95" between 15/16 & 1"
25mm 0.98" hair under 1"
26mm 1.02" hair over 1"
28mm 1.10" 1-1/8"
30mm 1.18" 1-3/16"
32mm 1.26" 1-1/4"
34mm 1.34" 1-1/3"
35mm 1.38" 1-3/8"
36mm 1.42" 1-7/16"
38mm 1.50" 1-1/2"
40mm 1.57" 1-9/16"
45mm 1.77" 1-3/4"
49mm 1.93" 1-15/16"
50mm 1.97" 2"