Fraction to Decimal Inches Conversion: Chart & Calculator

The inches fractional and decimal equivalents. Convert between fractions and decimal inches with this comprehensive reference table.

64ths32nds16ths8ths4thsHalfWholeDecimal (in)
1/640.0156
2/641/320.0313
3/640.0469
4/642/321/160.0625
5/640.0781
6/643/320.0938
7/640.1094
8/644/322/161/80.1250
9/640.1406
10/645/320.1563
11/640.1719
12/646/323/160.1875
13/640.2031
14/647/320.2188
15/640.2344
16/648/324/162/81/40.2500
17/640.2656
18/649/320.2813
19/640.2969
20/6410/325/160.3125
21/640.3281
22/6411/320.3438
23/640.3594
24/6412/326/163/80.3750
25/640.3906
26/6413/320.4063
27/640.4219
28/6414/327/160.4375
29/640.4531
30/6415/320.4688
31/640.4844
32/6416/328/164/82/41/20.5000
33/640.5156
34/6417/320.5313
35/640.5469
36/6418/329/160.5625
37/640.5781
38/6419/320.5938
39/640.6094
40/6420/3210/165/80.6250
41/640.6406
42/6421/320.6563
43/640.6719
44/6422/3211/160.6875
45/640.7031
46/6423/320.7188
47/640.7344
48/6424/3212/166/83/40.7500
49/640.7656
50/6425/320.7813
51/640.7969
52/6426/3213/160.8125
53/640.8281
54/6427/320.8438
55/640.8594
56/6428/3214/167/80.8750
57/640.8906
58/6429/320.9063
59/640.9219
60/6430/3215/160.9375
61/640.9531
62/6431/320.9688
63/640.9844
64/6432/3216/168/84/42/21/11.0000

About Fractions

Fractions consist of two basic parts:

  • Denominator - the bottom number
  • Numerator - the top number

Example: Converting 1/8" to Decimal

  1. Numerator (top number) = 1
  2. Denominator (bottom number) = 8
  3. Divide numerator by denominator: 1 ÷ 8 = 0.125

Conversion Reference

  • 1 inch = 25.4 mm
Fraction to Decimal Inches Conversion: Chart & Calculator | MEPKit Engineering Tools | MEPKit