Inches to Millimeters Conversion - How many mm in an inch?

1 Inch = 25.4 millimeters (mm). 1 Millimeter (millimetre) = 0.03937 inch.

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
Round:
Enter Inch
Enter Millimeter

How many millimeters are there in an inch?

There are 25.4 millimeters in an inch (25.4 mm in 1 in). 1 Millimeter (mm) = 0.0393701 inch.

If you would like to convert from millimeters to inches and also get more information and access the tables please check millimeters to inches conversion.

How to convert from inches to millimeters?

To convert from inches to millimeters (mm), multiply the number of inches "x" by 25.4.

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

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

What is an inch (in)?

Inch is an imperial and US Customary length unit. 1 Inch is equal to 25.4 millimeters. The abbreviation is "in".

What is a millimeter (millimetre)?

Millimeter (mm) is a metric system length unit. 1 Millimeter is equal to 0.0393701 inch. The abbreviation is "mm".

The list for your reference:

1 Inch (in) = 25.4 Millimeter (mm)
1 Millimeter (mm) = 0.0393701 Inch (in)

1/8 in = 3.175 mm
1/4 in = 6.35 mm
1/2 in = 12.7 mm
1 in = 25.4 mm
1.25 in = 31.75 mm
1.5 in = 38.1 mm
1.75 in = 44.45 mm
2 in = 50.8 mm
2.5 in = 63.5 mm
5 in = 127 mm
10 in = 254 mm

To find out how many millimeters there are in "x" inches for all conversion values please check the table below. If the inches to millimeters conversion value that you are looking for is not listed in the conversion table, you may also create your own custom conversion table.

Create Custom Conversion Table
To create your own custom conversion table click "Create Table" botton. To change values, you may enter a "Start" value (1, 2.5, 5 etc), select a an "Increment" value (0.01, 5, 100 etc) and select an "Accuracy" value to round the result.

Inches to Millimeters Conversion Table

InchMillimeterInchMillimeterInchMillimeterInchMillimeter
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