# 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.

The simplest fraction is  highlighted  and is the one you should use.

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

Reading along each row we can see equivalent fractions such as 4/64 = 2/32 = 1/16

164ths 132nds 116ths 18ths 14s 12s Decimal mm *
164

0.015625 0.397
264 132

0.03125 0.794
364

0.046875 1.191
464 232 116

0.0625 1.588
564

0.078125 1.984
664 332

0.09375 2.381
764

0.109375 2.778
864 432 216 18

0.125 3.175
964

0.140625 3.572
1064 532

0.15625 3.969
1164

0.171875 4.366
1264 632 316

0.1875 4.763
1364

0.203125 5.159
1464 732

0.21875 5.556
1564

0.234375 5.953
1664 832 416 28 14
0.25 6.35
1764

0.265625 6.747
1864 932

0.28125 7.144
1964

0.296875 7.541
2064 1032 516

0.3125 7.938
2164

0.328125 8.334
2264 1132

0.34375 8.731
2364

0.359375 9.128
2464 1232 616 38

0.375 9.525
2564

0.390625 9.922
2664 1332

0.40625 10.319
2764

0.421875 10.716
2864 1432 716

0.4375 11.113
2964

0.453125 11.509
3064 1532

0.46875 11.906
3164

0.484375 12.303
3264 1632 816 48 24 12 0.5 12.7
3364

0.515625 13.097
3464 1732

0.53125 13.494
3564

0.546875 13.891
3664 1832 916

0.5625 14.288
3764

0.578125 14.684
3864 1932

0.59375 15.081
3964

0.609375 15.478
4064 2032 1016 58

0.625 15.875
4164

0.640625 16.272
4264 2132

0.65625 16.669
4364

0.671875 17.066
4464 2232 1116

0.6875 17.463
4564

0.703125 17.859
4664 2332

0.71875 18.256
4764

0.734375 18.653
4864 2432 1216 68 34
0.75 19.05
4964

0.765625 19.447
5064 2532

0.78125 19.844
5164

0.796875 20.241
5264 2632 1316

0.8125 20.638
5364

0.828125 21.034
5464 2732

0.84375 21.431
5564

0.859375 21.828
5664 2832 1416 78

0.875 22.225
5764

0.890625 22.622
5864 2932

0.90625 23.019
5964

0.921875 23.416
6064 3032 1516

0.9375 23.813
6164

0.953125 24.209
6264 3132

0.96875 24.606
6364

0.984375 25.003
6464 3232 1616 88 44 22 25.4

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