Fraction/Decimal Chart

Here is a chart of some commonly-used fractions and their decimal equivalents.

These kind of fractions are often used for sizes of screws, nails and thicknesses of metal etc, in inches.

I have highlighted the simplest fraction, which is the one you should use.

Example: You would not talk about a 2/16" drill bit, instead you would say 1/8"

If you read along each row you can see equivalent fractions, such as 4/64 = 2/32 = 1/16

1/64ths 1/32nds 1/16ths 1/8ths 1/4s 1/2s Decimal mm *
1/64 0.015625 0.397
2/64 1/32 0.03125 0.794
3/64 0.046875 1.191
4/64 2/32 1/16 0.0625 1.588
5/64 0.078125 1.984
6/64 3/32 0.09375 2.381
7/64 0.109375 2.778
8/64 4/32 2/16 1/8 0.125 3.175
9/64 0.140625 3.572
10/64 5/32 0.15625 3.969
11/64 0.171875 4.366
12/64 6/32 3/16 0.1875 4.763
13/64 0.203125 5.159
14/64 7/32 0.21875 5.556
15/64 0.234375 5.953
16/64 8/32 4/16 2/8 1/4 0.25 6.35
17/64 0.265625 6.747
18/64 9/32 0.28125 7.144
19/64 0.296875 7.541
20/64 10/32 5/16 0.3125 7.938
21/64 0.328125 8.334
22/64 11/32 0.34375 8.731
23/64 0.359375 9.128
24/64 12/32 6/16 3/8 0.375 9.525
25/64 0.390625 9.922
26/64 13/32 0.40625 10.319
27/64 0.421875 10.716
28/64 14/32 7/16 0.4375 11.113
29/64 0.453125 11.509
30/64 15/32 0.46875 11.906
31/64 0.484375 12.303
32/64 16/32 8/16 4/8 2/4 1/2 0.5 12.7
33/64 0.515625 13.097
34/64 17/32 0.53125 13.494
35/64 0.546875 13.891
36/64 18/32 9/16 0.5625 14.288
37/64 0.578125 14.684
38/64 19/32 0.59375 15.081
39/64 0.609375 15.478
40/64 20/32 10/16 5/8 0.625 15.875
41/64 0.640625 16.272
42/64 21/32 0.65625 16.669
43/64 0.671875 17.066
44/64 22/32 11/16 0.6875 17.463
45/64 0.703125 17.859
46/64 23/32 0.71875 18.256
47/64 0.734375 18.653
48/64 24/32 12/16 6/8 3/4 0.75 19.05
49/64 0.765625 19.447
50/64 25/32 0.78125 19.844
51/64 0.796875 20.241
52/64 26/32 13/16 0.8125 20.638
53/64 0.828125 21.034
54/64 27/32 0.84375 21.431
55/64 0.859375 21.828
56/64 28/32 14/16 7/8 0.875 22.225
57/64 0.890625 22.622
58/64 29/32 0.90625 23.019
59/64 0.921875 23.416
60/64 30/32 15/16 0.9375 23.813
61/64 0.953125 24.209
62/64 31/32 0.96875 24.606
63/64 0.984375 25.003
64/64 32/32 16/16 8/8 4/4 2/2 1 25.4

* mm: if the fraction represents inches, then the "mm" column is the equivalent size in millimeters.