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 |
hand | 0.25 hand | 0.5 hand | 0.75 hand | 1 hand | 1.25 hand | 1.5 hand | 1.75 hand | 2 hand | 2.25 hand | 2.5 hand | 2.75 hand | 3 hand | 3.25 hand | 3.5 hand | 3.75 hand | 4 hand | 4.25 hand | 4.5 hand | 4.75 hand | 5 hand | 5.25 hand | 5.5 hand | 5.75 hand | 6 hand | 6.25 hand | 6.5 hand | 6.75 hand | 7 hand | 7.25 hand | 7.5 hand | 7.75 hand | 8 hand | 8.25 hand | 8.5 hand | 8.75 hand | 9 hand | 9.25 hand | 9.5 hand | 9.75 hand | 10 hand | 10.25 hand | 10.5 hand | 10.75 hand | 11 hand | 11.25 hand | 11.5 hand | 11.75 hand | 12 hand | 12.25 hand | 12.5 hand | 12.75 hand | 13 hand | 13.25 hand | 13.5 hand | 13.75 hand | 14 hand | 14.25 hand | 14.5 hand | 14.75 hand | 15 hand | 15.25 hand | 15.5 hand | 15.75 hand | 16 hand | 16.25 hand | 16.5 hand | 16.75 hand | 17 hand | 17.25 hand | 17.5 hand | 17.75 hand | 18 hand | 18.25 hand | 18.5 hand | 18.75 hand | 19 hand | 19.25 hand | 19.5 hand | 19.75 hand | 20 hand | 20.25 hand | 20.5 hand | 20.75 hand | 21 hand | 21.25 hand | 21.5 hand | 21.75 hand | 22 hand | 22.25 hand | 22.5 hand | 22.75 hand | 23 hand | 23.25 hand | 23.5 hand | 23.75 hand | 24 hand | 24.25 hand | 24.5 hand | 24.75 hand | 25 hand |
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 | hands | inches | hands |
---|---|---|---|
1 | ≡ 0.25 | 4 | ≡ 1 |
1.5 | ≡ 0.375 | 4.5 | ≡ 1.125 |
2 | ≡ 0.5 | 5 | ≡ 1.25 |
2.5 | ≡ 0.625 | 5.5 | ≡ 1.375 |
3 | ≡ 0.75 | 6 | ≡ 1.5 |
The hand is a non-SI unit of measurement of length standardized to 4 inches (101.6 mm). It is used to measure the height of horses in some English-speaking countries, including Australia, Canada, the Republic of Ireland, the United Kingdom and the United States.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
hand | ≡ 4 in | ≡ 0.1016 m | Metric system Non-SI |
hands | inches | hands | inches |
---|---|---|---|
1 | ≡ 4 | 4 | ≡ 16 |
1.5 | ≡ 6 | 4.5 | ≡ 18 |
2 | ≡ 8 | 5 | ≡ 20 |
2.5 | ≡ 10 | 5.5 | ≡ 22 |
3 | ≡ 12 | 6 | ≡ 24 |
inches | hands |
---|---|
1 | ≡ 0.25 |
4 | ≡ 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 …) |