| 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 |
| nail (cloth) | 0.4444444 nail (cloth) | 0.8888889 nail (cloth) | 1.3333333 nail (cloth) | 1.7777778 nail (cloth) | 2.2222222 nail (cloth) | 2.6666667 nail (cloth) | 3.1111111 nail (cloth) | 3.5555556 nail (cloth) | 4 nail (cloth) | 4.4444444 nail (cloth) | 4.8888889 nail (cloth) | 5.3333333 nail (cloth) | 5.7777778 nail (cloth) | 6.2222222 nail (cloth) | 6.6666667 nail (cloth) | 7.1111111 nail (cloth) | 7.5555556 nail (cloth) | 8 nail (cloth) | 8.4444444 nail (cloth) | 8.8888889 nail (cloth) | 9.3333333 nail (cloth) | 9.7777778 nail (cloth) | 10.2222222 nail (cloth) | 10.6666667 nail (cloth) | 11.1111111 nail (cloth) | 11.5555556 nail (cloth) | 12 nail (cloth) | 12.4444444 nail (cloth) | 12.8888889 nail (cloth) | 13.3333333 nail (cloth) | 13.7777778 nail (cloth) | 14.2222222 nail (cloth) | 14.6666667 nail (cloth) | 15.1111111 nail (cloth) | 15.5555556 nail (cloth) | 16 nail (cloth) | 16.4444444 nail (cloth) | 16.8888889 nail (cloth) | 17.3333333 nail (cloth) | 17.7777778 nail (cloth) | 18.2222222 nail (cloth) | 18.6666667 nail (cloth) | 19.1111111 nail (cloth) | 19.5555556 nail (cloth) | 20 nail (cloth) | 20.4444444 nail (cloth) | 20.8888889 nail (cloth) | 21.3333333 nail (cloth) | 21.7777778 nail (cloth) | 22.2222222 nail (cloth) | 22.6666667 nail (cloth) | 23.1111111 nail (cloth) | 23.5555556 nail (cloth) | 24 nail (cloth) | 24.4444444 nail (cloth) | 24.8888889 nail (cloth) | 25.3333333 nail (cloth) | 25.7777778 nail (cloth) | 26.2222222 nail (cloth) | 26.6666667 nail (cloth) | 27.1111111 nail (cloth) | 27.5555556 nail (cloth) | 28 nail (cloth) | 28.4444444 nail (cloth) | 28.8888889 nail (cloth) | 29.3333333 nail (cloth) | 29.7777778 nail (cloth) | 30.2222222 nail (cloth) | 30.6666667 nail (cloth) | 31.1111111 nail (cloth) | 31.5555556 nail (cloth) | 32 nail (cloth) | 32.4444444 nail (cloth) | 32.8888889 nail (cloth) | 33.3333333 nail (cloth) | 33.7777778 nail (cloth) | 34.2222222 nail (cloth) | 34.6666667 nail (cloth) | 35.1111111 nail (cloth) | 35.5555556 nail (cloth) | 36 nail (cloth) | 36.4444444 nail (cloth) | 36.8888889 nail (cloth) | 37.3333333 nail (cloth) | 37.7777778 nail (cloth) | 38.2222222 nail (cloth) | 38.6666667 nail (cloth) | 39.1111111 nail (cloth) | 39.5555556 nail (cloth) | 40 nail (cloth) | 40.4444444 nail (cloth) | 40.8888889 nail (cloth) | 41.3333333 nail (cloth) | 41.7777778 nail (cloth) | 42.2222222 nail (cloth) | 42.6666667 nail (cloth) | 43.1111111 nail (cloth) | 43.5555556 nail (cloth) | 44 nail (cloth) | 44.4444444 nail (cloth) |
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 | nails (cloth) | inches | nails (cloth) |
|---|---|---|---|
| 1 | = 0.44444444444444 | 4 | = 1.7777777777778 |
| 1.5 | = 0.66666666666667 | 4.5 | = 2 |
| 2 | = 0.88888888888889 | 5 | = 2.2222222222222 |
| 2.5 | = 1.1111111111111 | 5.5 | = 2.4444444444444 |
| 3 | = 1.3333333333333 | 6 | = 2.6666666666667 |
A nail, as a unit of cloth measurement, is generally a sixteenth of a yard or 2 1/4 inches (5.715 cm). The nail was apparently named after the practice of hammering brass nails into the counter at shops where cloth was sold.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| nail (cloth) | ≡ 2 1⁄4 in | = 0.05715 m | Other (Length) |
| nails (cloth) | inches | nails (cloth) | inches |
|---|---|---|---|
| 1 | = 2.25 | 4 | = 9 |
| 1.5 | = 3.375 | 4.5 | = 10.125 |
| 2 | = 4.5 | 5 | = 11.25 |
| 2.5 | = 5.625 | 5.5 | = 12.375 |
| 3 | = 6.75 | 6 | = 13.5 |
| inches | nails (cloth) |
|---|---|
| 1 | = 0.4444444 |
| 2.25 | = 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 …) |