Converting fractions to decimals
Router lifts and dial indicators often show measurements in thousandths of an inch
(.001"), but woodworkers tend to think in fractions, not decimals. To find a fraction’s
decimal equivalent, simply divide the top number by the bottom number (¤ = 1 divided
by 8, or .125"). To save you scrounging up a calculator for every adjustment, here’s a
handy conversion chart to keep by your router table and tablesaw.
fraction decimal
fraction decimal
fraction decimal
fraction decimal
1/64
0.016
17/64
0.266
33/64
0.516
49/64
49/64
0.766
0.766
1/32
0.031
9/32
0.281
17/32
0.531
25/32
0.781
3/64
0.047
19/64
19/64
0.297
0.297
35/64
0.547
51/64
51/64
0.797
0.797
1/16
0.063
5/16
0.313
9/16
0.563
13/16
0.813
5/64
0.078
21/64
21/64
0.328
0.328
37/64
0.578
53/64
53/64
0.828
0.828
3/32
0.094
11/32
0.344
19/32
0.594
27/32
0.844
7/64
0.109
23/64
23/64
0.359
0.359
39/64
0.609
55/64
55/64
0.859
0.859
1/8
0.125
3/8
0.375
5/8
0.625
7/8
0.875
9/64
0.141
25/64
25/64
0.391
0.391
41/64
0.641
57/64
57/64
0.891
0.891
5/32
0.156
13/32
0.406
21/32
0.656
29/32
0.906
11/64
0.172
27/64
27/64
0.422
0.422
43/64
0.672
59/64
59/64
0.922
0.922
3/16
0.188
7/16
0.438
11/16
0.688
15/16
0.938
13/64
0.203
29/64
29/64
0.453
0.453
45/64
0.703
61/64
61/64
0.953
0.953
7/32
0.219
15/32
0.469
23/32
0.719
31/32
0.969
15/64
0.234
31/64
31/64
0.484
0.484
47/64
0.734
63/64
63/64
0.984
0.984
1/4
0.250
1/2
0.500
3/4
0.750