| ell | 1 ell | 2 ell | 3 ell | 4 ell | 5 ell | 6 ell | 7 ell | 8 ell | 9 ell | 10 ell | 11 ell | 12 ell | 13 ell | 14 ell | 15 ell | 16 ell | 17 ell | 18 ell | 19 ell | 20 ell | 21 ell | 22 ell | 23 ell | 24 ell | 25 ell | 26 ell | 27 ell | 28 ell | 29 ell | 30 ell | 31 ell | 32 ell | 33 ell | 34 ell | 35 ell | 36 ell | 37 ell | 38 ell | 39 ell | 40 ell | 41 ell | 42 ell | 43 ell | 44 ell | 45 ell | 46 ell | 47 ell | 48 ell | 49 ell | 50 ell | 51 ell | 52 ell | 53 ell | 54 ell | 55 ell | 56 ell | 57 ell | 58 ell | 59 ell | 60 ell | 61 ell | 62 ell | 63 ell | 64 ell | 65 ell | 66 ell | 67 ell | 68 ell | 69 ell | 70 ell | 71 ell | 72 ell | 73 ell | 74 ell | 75 ell | 76 ell | 77 ell | 78 ell | 79 ell | 80 ell | 81 ell | 82 ell | 83 ell | 84 ell | 85 ell | 86 ell | 87 ell | 88 ell | 89 ell | 90 ell | 91 ell | 92 ell | 93 ell | 94 ell | 95 ell | 96 ell | 97 ell | 98 ell | 99 ell | 100 ell |
| foot | 3.75 ft | 7.5 ft | 11.25 ft | 15 ft | 18.75 ft | 22.5 ft | 26.25 ft | 30 ft | 33.75 ft | 37.5 ft | 41.25 ft | 45 ft | 48.75 ft | 52.5 ft | 56.25 ft | 60 ft | 63.75 ft | 67.5 ft | 71.25 ft | 75 ft | 78.75 ft | 82.5 ft | 86.25 ft | 90 ft | 93.75 ft | 97.5 ft | 101.25 ft | 105 ft | 108.75 ft | 112.5 ft | 116.25 ft | 120 ft | 123.75 ft | 127.5 ft | 131.25 ft | 135 ft | 138.75 ft | 142.5 ft | 146.25 ft | 150 ft | 153.75 ft | 157.5 ft | 161.25 ft | 165 ft | 168.75 ft | 172.5 ft | 176.25 ft | 180 ft | 183.75 ft | 187.5 ft | 191.25 ft | 195 ft | 198.75 ft | 202.5 ft | 206.25 ft | 210 ft | 213.75 ft | 217.5 ft | 221.25 ft | 225 ft | 228.75 ft | 232.5 ft | 236.25 ft | 240 ft | 243.75 ft | 247.5 ft | 251.25 ft | 255 ft | 258.75 ft | 262.5 ft | 266.25 ft | 270 ft | 273.75 ft | 277.5 ft | 281.25 ft | 285 ft | 288.75 ft | 292.5 ft | 296.25 ft | 300 ft | 303.75 ft | 307.5 ft | 311.25 ft | 315 ft | 318.75 ft | 322.5 ft | 326.25 ft | 330 ft | 333.75 ft | 337.5 ft | 341.25 ft | 345 ft | 348.75 ft | 352.5 ft | 356.25 ft | 360 ft | 363.75 ft | 367.5 ft | 371.25 ft | 375 ft |
An ell (from Proto-Germanic *alinō, cognate with Latin ulna) is a unit of measurement, originally a cubit, i.e., approximating the length of a man's arm from the elbow ("elbow" means the bend or bow of the ell or arm) to the tip of the middle finger, or about 18 inches (457 mm); in later usage, any of several longer units.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| ell | ell | ≡ 45 in (In England usually) | = 1.143 m | Other (Length) |
| ell | feet | ell | feet |
|---|---|---|---|
| 1 | = 3.75 | 4 | = 15 |
| 1.5 | = 5.625 | 4.5 | = 16.875 |
| 2 | = 7.5 | 5 | = 18.75 |
| 2.5 | = 9.375 | 5.5 | = 20.625 |
| 3 | = 11.25 | 6 | = 22.5 |
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 | ell | feet | ell |
|---|---|---|---|
| 1 | = 0.26666666666667 | 4 | = 1.0666666666667 |
| 1.5 | = 0.4 | 4.5 | = 1.2 |
| 2 | = 0.53333333333333 | 5 | = 1.3333333333333 |
| 2.5 | = 0.66666666666667 | 5.5 | = 1.4666666666667 |
| 3 | = 0.8 | 6 | = 1.6 |
| ell | feet |
|---|---|
| 1 | = 3.75 |
| 0.2666667 | = 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 …) |