Fraction Decimal Chart

1/64 Fraction to Decimal Chart

Use this 1/64 chart when you need fine inch fractions, decimal inches, and millimeters in one place.

Printable 1/64 Chart

Use the main calculator to enter fractions, decimals, mixed inch values, or millimeters. The chart below gives quick reference values for this page.

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1/64 Inch Fraction Chart

Every 1/64 increment from 1/64 through 1 inch.

FractionDecimalMillimetersNearest 1/64
1/64 0.0156 0.397 1/64
1/32 0.0313 0.794 1/32
3/64 0.0469 1.191 3/64
1/16 0.0625 1.588 1/16
5/64 0.0781 1.984 5/64
3/32 0.0938 2.381 3/32
7/64 0.1094 2.778 7/64
1/8 0.1250 3.175 1/8
9/64 0.1406 3.572 9/64
5/32 0.1563 3.969 5/32
11/64 0.1719 4.366 11/64
3/16 0.1875 4.763 3/16
13/64 0.2031 5.159 13/64
7/32 0.2188 5.556 7/32
15/64 0.2344 5.953 15/64
1/4 0.2500 6.350 1/4
17/64 0.2656 6.747 17/64
9/32 0.2813 7.144 9/32
19/64 0.2969 7.541 19/64
5/16 0.3125 7.938 5/16
21/64 0.3281 8.334 21/64
11/32 0.3438 8.731 11/32
23/64 0.3594 9.128 23/64
3/8 0.3750 9.525 3/8
25/64 0.3906 9.922 25/64
13/32 0.4063 10.319 13/32
27/64 0.4219 10.716 27/64
7/16 0.4375 11.113 7/16
29/64 0.4531 11.509 29/64
15/32 0.4688 11.906 15/32
31/64 0.4844 12.303 31/64
1/2 0.5000 12.700 1/2
33/64 0.5156 13.097 33/64
17/32 0.5313 13.494 17/32
35/64 0.5469 13.891 35/64
9/16 0.5625 14.288 9/16
37/64 0.5781 14.684 37/64
19/32 0.5938 15.081 19/32
39/64 0.6094 15.478 39/64
5/8 0.6250 15.875 5/8
41/64 0.6406 16.272 41/64
21/32 0.6563 16.669 21/32
43/64 0.6719 17.066 43/64
11/16 0.6875 17.463 11/16
45/64 0.7031 17.859 45/64
23/32 0.7188 18.256 23/32
47/64 0.7344 18.653 47/64
3/4 0.7500 19.050 3/4
49/64 0.7656 19.447 49/64
25/32 0.7813 19.844 25/32
51/64 0.7969 20.241 51/64
13/16 0.8125 20.638 13/16
53/64 0.8281 21.034 53/64
27/32 0.8438 21.431 27/32
55/64 0.8594 21.828 55/64
7/8 0.8750 22.225 7/8
57/64 0.8906 22.622 57/64
29/32 0.9063 23.019 29/32
59/64 0.9219 23.416 59/64
15/16 0.9375 23.813 15/16
61/64 0.9531 24.209 61/64
31/32 0.9688 24.606 31/32
63/64 0.9844 25.003 63/64
1 1.0000 25.400 1

Note: Values are based on 1 inch = 25.4 millimeters.

When 1/64 helps

  • Use 1/64 for fine layout marks.
  • Check the decimal value before machining.
  • Print the table when working away from a computer.

Common values

  • 16/64 simplifies to 1/4.
  • 24/64 simplifies to 3/8.
  • 32/64 simplifies to 1/2.

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