| foot | 1 ft | 2 ft | 3 ft | 4 ft | 5 ft | 6 ft | 7 ft | 8 ft | 9 ft | 10 ft | 11 ft | 12 ft | 13 ft | 14 ft | 15 ft | 16 ft | 17 ft | 18 ft | 19 ft | 20 ft | 21 ft | 22 ft | 23 ft | 24 ft | 25 ft | 26 ft | 27 ft | 28 ft | 29 ft | 30 ft | 31 ft | 32 ft | 33 ft | 34 ft | 35 ft | 36 ft | 37 ft | 38 ft | 39 ft | 40 ft | 41 ft | 42 ft | 43 ft | 44 ft | 45 ft | 46 ft | 47 ft | 48 ft | 49 ft | 50 ft | 51 ft | 52 ft | 53 ft | 54 ft | 55 ft | 56 ft | 57 ft | 58 ft | 59 ft | 60 ft | 61 ft | 62 ft | 63 ft | 64 ft | 65 ft | 66 ft | 67 ft | 68 ft | 69 ft | 70 ft | 71 ft | 72 ft | 73 ft | 74 ft | 75 ft | 76 ft | 77 ft | 78 ft | 79 ft | 80 ft | 81 ft | 82 ft | 83 ft | 84 ft | 85 ft | 86 ft | 87 ft | 88 ft | 89 ft | 90 ft | 91 ft | 92 ft | 93 ft | 94 ft | 95 ft | 96 ft | 97 ft | 98 ft | 99 ft | 100 ft |
| inch | 12 in | 24 in | 36 in | 48 in | 60 in | 72 in | 84 in | 96 in | 108 in | 120 in | 132 in | 144 in | 156 in | 168 in | 180 in | 192 in | 204 in | 216 in | 228 in | 240 in | 252 in | 264 in | 276 in | 288 in | 300 in | 312 in | 324 in | 336 in | 348 in | 360 in | 372 in | 384 in | 396 in | 408 in | 420 in | 432 in | 444 in | 456 in | 468 in | 480 in | 492 in | 504 in | 516 in | 528 in | 540 in | 552 in | 564 in | 576 in | 588 in | 600 in | 612 in | 624 in | 636 in | 648 in | 660 in | 672 in | 684 in | 696 in | 708 in | 720 in | 732 in | 744 in | 756 in | 768 in | 780 in | 792 in | 804 in | 816 in | 828 in | 840 in | 852 in | 864 in | 876 in | 888 in | 900 in | 912 in | 924 in | 936 in | 948 in | 960 in | 972 in | 984 in | 996 in | 1 008 in | 1 020 in | 1 032 in | 1 044 in | 1 056 in | 1 068 in | 1 080 in | 1 092 in | 1 104 in | 1 116 in | 1 128 in | 1 140 in | 1 152 in | 1 164 in | 1 176 in | 1 188 in | 1 200 in |
The foot (pl. feet; abbreviation: ft; symbol: ′, the prime symbol) is a unit of length in the imperial and US customary systems of measurement. Since 1959, both units have been defined by international agreement as equivalent to 0.3048 meters exactly. In both systems, the foot comprises 12 inches and three feet compose a yard.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| foot | ft | ≡ 0.3048 m ≡ 1⁄3 yd ≡ 12 inches | ≡ 0.3048 m | Imperial/US |
| feet | inches | feet | inches |
|---|---|---|---|
| 1 | ≡ 12 | 4 | ≡ 48 |
| 1.5 | ≡ 18 | 4.5 | ≡ 54 |
| 2 | ≡ 24 | 5 | ≡ 60 |
| 2.5 | ≡ 30 | 5.5 | ≡ 66 |
| 3 | ≡ 36 | 6 | ≡ 72 |
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 | feet | inches | feet |
|---|---|---|---|
| 1 | ≡ 0.083333333333333 | 4 | ≡ 0.33333333333333 |
| 1.5 | ≡ 0.125 | 4.5 | ≡ 0.375 |
| 2 | ≡ 0.16666666666667 | 5 | ≡ 0.41666666666667 |
| 2.5 | ≡ 0.20833333333333 | 5.5 | ≡ 0.45833333333333 |
| 3 | ≡ 0.25 | 6 | ≡ 0.5 |
| feet | inches |
|---|---|
| 1 | ≡ 12 |
| 0.0833333 | ≡ 1 |
You can find the conversion in other languages in the following:
| 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 …) |