inch | 1 in | 2 in | 3 in | 4 in | 5 in | 6 in | 7 in | 8 in | 9 in | 10 in | 11 in | 12 in | 13 in | 14 in | 15 in | 16 in | 17 in | 18 in | 19 in | 20 in | 21 in | 22 in | 23 in | 24 in | 25 in | 26 in | 27 in | 28 in | 29 in | 30 in | 31 in | 32 in | 33 in | 34 in | 35 in | 36 in | 37 in | 38 in | 39 in | 40 in | 41 in | 42 in | 43 in | 44 in | 45 in | 46 in | 47 in | 48 in | 49 in | 50 in | 51 in | 52 in | 53 in | 54 in | 55 in | 56 in | 57 in | 58 in | 59 in | 60 in | 61 in | 62 in | 63 in | 64 in | 65 in | 66 in | 67 in | 68 in | 69 in | 70 in | 71 in | 72 in | 73 in | 74 in | 75 in | 76 in | 77 in | 78 in | 79 in | 80 in | 81 in | 82 in | 83 in | 84 in | 85 in | 86 in | 87 in | 88 in | 89 in | 90 in | 91 in | 92 in | 93 in | 94 in | 95 in | 96 in | 97 in | 98 in | 99 in | 100 in |
mil | 1 000 mil | 2 000 mil | 3 000 mil | 4 000 mil | 5 000 mil | 6 000 mil | 7 000 mil | 8 000 mil | 9 000 mil | 10 000 mil | 11 000 mil | 12 000 mil | 13 000 mil | 14 000 mil | 15 000 mil | 16 000 mil | 17 000 mil | 18 000 mil | 19 000 mil | 20 000 mil | 21 000 mil | 22 000 mil | 23 000 mil | 24 000 mil | 25 000 mil | 26 000 mil | 27 000 mil | 28 000 mil | 29 000 mil | 30 000 mil | 31 000 mil | 32 000 mil | 33 000 mil | 34 000 mil | 35 000 mil | 36 000 mil | 37 000 mil | 38 000 mil | 39 000 mil | 40 000 mil | 41 000 mil | 42 000 mil | 43 000 mil | 44 000 mil | 45 000 mil | 46 000 mil | 47 000 mil | 48 000 mil | 49 000 mil | 50 000 mil | 51 000 mil | 52 000 mil | 53 000 mil | 54 000 mil | 55 000 mil | 56 000 mil | 57 000 mil | 58 000 mil | 59 000 mil | 60 000 mil | 61 000 mil | 62 000 mil | 63 000 mil | 64 000 mil | 65 000 mil | 66 000 mil | 67 000 mil | 68 000 mil | 69 000 mil | 70 000 mil | 71 000 mil | 72 000 mil | 73 000 mil | 74 000 mil | 75 000 mil | 76 000 mil | 77 000 mil | 78 000 mil | 79 000 mil | 80 000 mil | 81 000 mil | 82 000 mil | 83 000 mil | 84 000 mil | 85 000 mil | 86 000 mil | 87 000 mil | 88 000 mil | 89 000 mil | 90 000 mil | 91 000 mil | 92 000 mil | 93 000 mil | 94 000 mil | 95 000 mil | 96 000 mil | 97 000 mil | 98 000 mil | 99 000 mil | 100 000 mil |
The inch (abbreviation: in or ″) is a unit of length in the (British) imperial and United States customary systems of measurement now formally equal to 1⁄36 yard but usually understood as 1⁄12 of a foot. Derived from the Roman uncia ("twelfth"), inch is also sometimes used to translate related units in other measurement systems, usually understood as deriving from the width of the human thumb.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
inch | in | ≡ 2.54 cm ≡ 1⁄36 yd ≡ 1⁄12 ft | ≡ 0.0254 m | Imperial/US |
inches | mils | inches | mils |
---|---|---|---|
1 | ≡ 1000 | 4 | ≡ 4000 |
1.5 | ≡ 1500 | 4.5 | ≡ 4500 |
2 | ≡ 2000 | 5 | ≡ 5000 |
2.5 | ≡ 2500 | 5.5 | ≡ 5500 |
3 | ≡ 3000 | 6 | ≡ 6000 |
A thousandth of an inch is a derived unit of length in an inch-based system of units. Equal to 0.001 inches, it is normally referred to as a thou /ˈθaʊ/, a thousandth, or (particularly in the United States) a mil.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
mil | mil | ≡ 1×10−3 in | ≡ 2.54×10−5 m | Imperial/US |
mils | inches | mils | inches |
---|---|---|---|
1 | ≡ 0.001 | 4 | ≡ 0.004 |
1.5 | ≡ 0.0015 | 4.5 | ≡ 0.0045 |
2 | ≡ 0.002 | 5 | ≡ 0.005 |
2.5 | ≡ 0.0025 | 5.5 | ≡ 0.0055 |
3 | ≡ 0.003 | 6 | ≡ 0.006 |
inches | mils |
---|---|
1 | ≡ 1 000 |
0.001 | ≡ 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |