| 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 |
| palm | 4 palm | 8 palm | 12 palm | 16 palm | 20 palm | 24 palm | 28 palm | 32 palm | 36 palm | 40 palm | 44 palm | 48 palm | 52 palm | 56 palm | 60 palm | 64 palm | 68 palm | 72 palm | 76 palm | 80 palm | 84 palm | 88 palm | 92 palm | 96 palm | 100 palm | 104 palm | 108 palm | 112 palm | 116 palm | 120 palm | 124 palm | 128 palm | 132 palm | 136 palm | 140 palm | 144 palm | 148 palm | 152 palm | 156 palm | 160 palm | 164 palm | 168 palm | 172 palm | 176 palm | 180 palm | 184 palm | 188 palm | 192 palm | 196 palm | 200 palm | 204 palm | 208 palm | 212 palm | 216 palm | 220 palm | 224 palm | 228 palm | 232 palm | 236 palm | 240 palm | 244 palm | 248 palm | 252 palm | 256 palm | 260 palm | 264 palm | 268 palm | 272 palm | 276 palm | 280 palm | 284 palm | 288 palm | 292 palm | 296 palm | 300 palm | 304 palm | 308 palm | 312 palm | 316 palm | 320 palm | 324 palm | 328 palm | 332 palm | 336 palm | 340 palm | 344 palm | 348 palm | 352 palm | 356 palm | 360 palm | 364 palm | 368 palm | 372 palm | 376 palm | 380 palm | 384 palm | 388 palm | 392 palm | 396 palm | 400 palm |
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 | palms | feet | palms |
|---|---|---|---|
| 1 | = 4 | 4 | = 16 |
| 1.5 | = 6 | 4.5 | = 18 |
| 2 | = 8 | 5 | = 20 |
| 2.5 | = 10 | 5.5 | = 22 |
| 3 | = 12 | 6 | = 24 |
The palm is an obsolete anthropic unit of length, originally based on the width of the human palm and then variously standardized. The same name is also used for a second, rather larger unit based on the length of the human hand.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| palm | ≡ 3 in | = 0.0762 m | Other (Length) |
| palms | feet | palms | feet |
|---|---|---|---|
| 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 |
| feet | palms |
|---|---|
| 1 | = 4 |
| 0.25 | = 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 …) |