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Inch Fractions to Decimals to Millimeters Conversion Chart

By Jack Gray, Roof Online Editor • Updated October 8, 2022

The following tables show the measurement equivalents of inches in fractions, inches in decimals, and millimeters.

To convert inches to millimeters, multiply inches by 25.4.

To convert millimeters to inches, multiply millimeters by 0.03937.

Inch Fractions to Decimals to Millimeters Table

Inch Fraction Inch Decimal Millimeter
1/64″ 0.0156 0.3969
1/32″ 0.0313 0.7938
3/64″ 0.0469 1.1906
1/16″ 0.0625 1.5875
5/64″ 0.0781 1.9844
3/32″ 0.0938 2.3813
7/64″ 0.1094 2.7781
1/8″ 0.1250 3.1750
9/64″ 0.1406 3.5719
5/32″ 0.1563 3.9688
11/64″ 0.1719 4.3656
3/16″ 0.1875 4.7625
13/64″ 0.2031 5.1594
7/32″ 0.2188 5.5563
15/64″ 0.2344 5.9531
1/4″ 0.2500 6.3500
17/64″ 0.2656 6.7469
9/32″ 0.2813 7.1438
19/64″ 0.2969 7.5406
5/16″ 0.3125 7.9375
21/64″ 0.3281 8.3344
11/32″ 0.3438 8.7313
23/64″ 0.3594 9.1281
3/8″ 0.3750 9.5250
25/64″ 0.3906 9.9219
13/32″ 0.4063 10.3188
27/64″ 0.4219 10.7156
7/16″ 0.4375 11.1125
29/64″ 0.4531 11.5094
15/32″ 0.4688 11.9063
31/64″ 0.4844 12.3031
1/2″ 0.5000 12.7000
33/64″ 0.5156 13.0969
17/32″ 0.5313 13.4938
35/64″ 0.5469 13.8906
9/16″ 0.5625 14.2875
37/64″ 0.5781 14.6844
19/32″ 0.5938 15.0813
39/64″ 0.6094 15.4781
5/8″ 0.6250 15.8750
41/64″ 0.6406 16.2719
21/32″ 0.6563 16.6688
43/64″ 0.6719 17.0656
11/16″ 0.6875 17.4625
45/64″ 0.7031 17.8594
23/32″ 0.7188 18.2563
47/64″ 0.7344 18.6531
3/4″ 0.7500 19.0500
49/64″ 0.7656 19.4469
25/32″ 0.7813 19.8438
51/64″ 0.7969 20.2406
13/16″ 0.8125 20.6375
53/64″ 0.8281 21.0344
27/32″ 0.8438 21.4313
55/64″ 0.8594 21.8281
7/8″ 0.8750 22.2250
57/64″ 0.8906 22.6219
29/32″ 0.9063 23.0188
59/64″ 0.9219 23.4156
15/16″ 0.9375 23.8125
61/64″ 0.9531 24.2094
31/32″ 0.9688 24.6063
63/64″ 0.9844 25.0031
1″ 1.0000 25.4000
Inch Fraction Inch Decimal Millimeter
1-1/64″ 1.0156 25.7969
1-1/32″ 1.0313 26.1938
1-3/64″ 1.0469 26.5906
1-1/16″ 1.0625 26.9875
1-5/64″ 1.0781 27.3844
1-3/32″ 1.0938 27.7813
1-7/64″ 1.1094 28.1781
1-1/8″ 1.1250 28.5750
1-9/64″ 1.1406 28.9719
1-5/32″ 1.1563 29.3688
1-11/64″ 1.1719 29.7656
1-3/16″ 1.1875 30.1625
1-13/64″ 1.2031 30.5594
1-7/32″ 1.2188 30.9563
1-15/64″ 1.2344 31.3531
1-1/4″ 1.2500 31.7500
1-17/64″ 1.2656 32.1469
1-9/32″ 1.2813 32.5438
1-19/64″ 1.2969 32.9406
1-5/16″ 1.3125 33.3375
1-21/64″ 1.3281 33.7344
1-11/32″ 1.3438 34.1313
1-23/64″ 1.3594 34.5281
1-3/8″ 1.3750 34.9250
1-25/64″ 1.3906 35.3219
1-13/32″ 1.4063 35.7188
1-27/64″ 1.4219 36.1156
1-7/16″ 1.4375 36.5125
1-29/64″ 1.4531 36.9094
1-15/32″ 1.4688 37.3063
1-31/64″ 1.4844 37.7031
1-1/2″ 1.5000 38.1000
1-33/64″ 1.5156 38.4969
1-17/32″ 1.5313 38.8938
1-35/64″ 1.5469 39.2906
1-9/16″ 1.5625 39.6875
1-37/64″ 1.5781 40.0844
1-19/32″ 1.5938 40.4813
1-39/64″ 1.6094 40.8781
1-5/8″ 1.6250 41.2750
1-41/64″ 1.6406 41.6719
1-21/32″ 1.6563 42.0688
1-43/64″ 1.6719 42.4656
1-11/16″ 1.6875 42.8625
1-45/64″ 1.7031 43.2594
1-23/32″ 1.7188 43.6563
1-47/64″ 1.7344 44.0531
1-3/4″ 1.7500 44.4500
1-49/64″ 1.7656 44.8469
1-25/32″ 1.7813 45.2438
1-51/64″ 1.7969 45.6406
1-13/16″ 1.8125 46.0375
1-53/64″ 1.8281 46.4344
1-27/32″ 1.8438 46.8313
1-55/64″ 1.8594 47.2281
1-7/8″ 1.8750 47.6250
1-57/64″ 1.8906 48.0219
1-29/32″ 1.9063 48.4188
1-59/64″ 1.9219 48.8156
1-15/16″ 1.9375 49.2125
1-61/64″ 1.9531 49.6094
1-31/32″ 1.9688 50.0063
1-63/64″ 1.9844 50.4031
2″ 2.0000 50.8000
Inch Fraction Inch Decimal Millimeter
2-1/64″ 2.0156 51.1969
2-1/32″ 2.0313 51.5938
2-3/64″ 2.0469 51.9906
2-1/16″ 2.0625 52.3875
2-5/64″ 2.0781 52.7844
2-3/32″ 2.0938 53.1813
2-7/64″ 2.1094 53.5781
2-1/8″ 2.1250 53.9750
2-9/64″ 2.1406 54.3719
2-5/32″ 2.1563 54.7688
2-11/64″ 2.1719 55.1656
2-3/16″ 2.1875 55.5625
2-13/64″ 2.2031 55.9594
2-7/32″ 2.2188 56.3563
2-15/64″ 2.2344 56.7531
2-1/4″ 2.2500 57.1500
2-17/64″ 2.2656 57.5469
2-9/32″ 2.2813 57.9438
2-19/64″ 2.2969 58.3406
2-5/16″ 2.3125 58.7375
2-21/64″ 2.3281 59.1344
2-11/32″ 2.3438 59.5313
2-23/64″ 2.3594 59.9281
2-3/8″ 2.3750 60.3250
2-25/64″ 2.3906 60.7219
2-13/32″ 2.4063 61.1188
2-27/64″ 2.4219 61.5156
2-7/16″ 2.4375 61.9125
2-29/64″ 2.4531 62.3094
2-15/32″ 2.4688 62.7063
2-31/64″ 2.4844 63.1031
2-1/2″ 2.5000 63.5000
2-33/64″ 2.5156 63.8969
2-17/32″ 2.5313 64.2938
2-35/64″ 2.5469 64.6906
2-9/16″ 2.5625 65.0875
2-37/64″ 2.5781 65.4844
2-19/32″ 2.5938 65.8813
2-39/64″ 2.6094 66.2781
2-5/8″ 2.6250 66.6750
2-41/64″ 2.6406 67.0719
2-21/32″ 2.6563 67.4688
2-43/64″ 2.6719 67.8656
2-11/16″ 2.6875 68.2625
2-45/64″ 2.7031 68.6594
2-23/32″ 2.7188 69.0563
2-47/64″ 2.7344 69.4531
2-3/4″ 2.7500 69.8500
2-49/64″ 2.7656 70.2469
2-25/32″ 2.7813 70.6438
2-51/64″ 2.7969 71.0406
2-13/16″ 2.8125 71.4375
2-53/64″ 2.8281 71.8344
2-27/32″ 2.8438 72.2313
2-55/64″ 2.8594 72.6281
2-7/8″ 2.8750 73.0250
2-57/64″ 2.8906 73.4219
2-29/32″ 2.9063 73.8188
2-59/64″ 2.9219 74.2156
2-15/16″ 2.9375 74.6125
2-61/64″ 2.9531 75.0094
2-31/32″ 2.9688 75.4063
2-63/64″ 2.9844 75.8031
3″ 3.0000 76.2000