Inches to Millimeters Conversion

Quick Lookup (Round: 2). inches to mm

in 1/8 1/4 1/2 3/4 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 60 70 80 90 100
mm 3.18 6.35 12.7 19.05 25.4 38.1 50.8 63.5 76.2 88.9 101.6 114.3 127 139.7 152.4 165.1 177.8 190.5 203.2 215.9 228.6 241.3 254 279.4 304.8 330.2 355.6 381 406.4 431.8 457.2 482.6 508 533.4 558.8 584.2 609.6 635 660.4 685.8 711.2 736.6 762 787.4 812.8 838.2 863.6 889 914.4 939.8 965.2 990.6 1016 1041.4 1066.8 1092.2 1117.6 1143 1168.4 1193.8 1219.2 1244.6 1270 1524 1778 2032 2286 2540
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► inches to cm

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How many millimeters (mm) in an inch?

There are 25.4 mm in an inch. To convert inches to mm, multiply the inch value by 25.4.

For example, to find out how many mm in an inch and a half, multiply 1.5 by 25.4, that makes 38.1 mm in an inch and a half.

1 Inch = 25.4 Millimeters

How many inches in a millimeters?

1 Millimeter is equal to 0.0393701 inch. To convert millimeters to inches, multiply the millimeter value by 0.0393701 or divide by 25.4.

For example, to convert 55 mm to inches, divide 55 by 25.4, that makes 2.16535 inches in 55 mm.

1 Millimeter = 0.0393701 Inch

You may also use this length and distance units conversion calculator tool to convert between inches, millimeters and all other length and distance units.

What is an Inch?

Inch is an imperial and United States Customary length unit. 1 inch = 25.4mm. The symbol is "in".

What is a Millimeter?

Millimeter (millimetre) is a metric system length unit. 1 mm = 0.0393701 inch. The symbol is "mm".

Create Conversion Table
Click "Create Table". Enter a "Start" value (5, 100 etc). Select an "Increment" value (0.01, 5 etc) and select "Accuracy" to round the result.

Inches to mm Conversion Table

InchMMInchMMInchMMInchMM
1 25.4 26 660.4 51 1295.4 76 1930.4
2 50.8 27 685.8 52 1320.8 77 1955.8
3 76.2 28 711.2 53 1346.2 78 1981.2
4 101.6 29 736.6 54 1371.6 79 2006.6
5 127 30 762 55 1397 80 2032
6 152.4 31 787.4 56 1422.4 81 2057.4
7 177.8 32 812.8 57 1447.8 82 2082.8
8 203.2 33 838.2 58 1473.2 83 2108.2
9 228.6 34 863.6 59 1498.6 84 2133.6
10 254 35 889 60 1524 85 2159
11 279.4 36 914.4 61 1549.4 86 2184.4
12 304.8 37 939.8 62 1574.8 87 2209.8
13 330.2 38 965.2 63 1600.2 88 2235.2
14 355.6 39 990.6 64 1625.6 89 2260.6
15 381 40 1016 65 1651 90 2286
16 406.4 41 1041.4 66 1676.4 100 254
17 431.8 42 1066.8 67 1701.8 125 3175
18 457.2 43 1092.2 68 1727.2 150 381
19 482.6 44 1117.6 69 1752.6 175 4445
20 508 45 1143 70 1778 200 508
21 533.4 46 1168.4 71 1803.4 250 635
22 558.8 47 1193.8 72 1828.8 300 762
23 584.2 48 1219.2 73 1854.2 500 1270
24 609.6 49 1244.6 74 1879.6 750 1905
25 635 50 127 75 1905 1000 2540
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