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Inches to Decimal to Millimeters Conversion Chart

Fractional Inches to Decimal Inches to Approximate Millimeters

Decimal inches multiplied by 25.4 = approximate mm.

1 pica = 12 points

1 inch = 14 agates

6 picas = approx. 1 inch (.9936 inch)

1 inch = 2.54 centimeters

1 point = .0138

1 inch = 25.4 millimeters

Fractional
Inch

Decimal
Inch

Approximate
Millimeters
1/64 .015625 .396875
1/32 .03125 .79375
3/64 .046875 1.190625

1/16

0.0625

1.5875
5/64 .078125 1.984375
3/32 .09375 2.38125
7/64 .109375 2.778125

1/8

0.1250

3.1750
9/64 .140625 3.571875
5/32 .15625 3.96875
11/64 .171875 4.365625

3/16

0.1875

4.7625
13/64 .203125 5.159375
7/32 .21875 5.55625
15/64 .234375 5.953125

1/4

0.2500

6.3500
17/64 .265625 6.746875
9/32 .28125 7.14375
19/64 .296875 7.540625

5/16

0.3125

7.9375
21/64 .328125 8.334375
11/32 .34375 8.73125
23/64 .359375 9.128125

3/8

0.3750

9.5250
25/64 .390625 9.921875
13/32 .40625 10.31875
27/64 .421875 10.715625

7/16

0.4375

11.1125
29/64 .453125 11.509375
15/32 .46875 11.90625
31/64 .484375 12.303125

1/2

0.5000

12.7000
33/64 .515625 13.096875
17/32 .53125 13.49375
35/64 .546875 13.890625

9/16

0.5625

14.2875
37/64 .578125 14.684375
19/32 .59375 15.08125
39/64 .609375 15.478125

5/8

0.6250

15.8750
41/64 .640625 16.271875
21/32 .65625 16.66875
43/64 .671875 17.065625

11/16

0.6875

17.4625
45/64 .703125 17.859375
23/32 .71875 18.25625
47/64 .734375 18.653125

3/4

0.7500

19.0500
49/64 .765625 19.446875
25/32 .78125 19.84375
51/64 .796875 20.240625

13/16

0.8125

20.6375
53/64 .828125 21.034375
27/32 .84375 21.43125
55/64 .859375 21.828125

7/8

0.8750

22.2250
57/64 .890625 22.621875
29/32 .90625 23.01875
59/64 .921875 23.415625

15/16

0.9375

23.8125
61/64 .953125 24.209375
31/32 .96875 24.60625
63/64 .984375 25.003125

1

1.0

25.4

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