| 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 |
| metric inch | 762 in (metric) | 1 524 in (metric) | 2 286 in (metric) | 3 048 in (metric) | 3 810 in (metric) | 4 572 in (metric) | 5 334 in (metric) | 6 096 in (metric) | 6 858 in (metric) | 7 620 in (metric) | 8 382 in (metric) | 9 144 in (metric) | 9 906 in (metric) | 10 668 in (metric) | 11 430 in (metric) | 12 192 in (metric) | 12 954 in (metric) | 13 716 in (metric) | 14 478 in (metric) | 15 240 in (metric) | 16 002 in (metric) | 16 764 in (metric) | 17 526 in (metric) | 18 288 in (metric) | 19 050 in (metric) | 19 812 in (metric) | 20 574 in (metric) | 21 336 in (metric) | 22 098 in (metric) | 22 860 in (metric) | 23 622 in (metric) | 24 384 in (metric) | 25 146 in (metric) | 25 908 in (metric) | 26 670 in (metric) | 27 432 in (metric) | 28 194 in (metric) | 28 956 in (metric) | 29 718 in (metric) | 30 480 in (metric) | 31 242 in (metric) | 32 004 in (metric) | 32 766 in (metric) | 33 528 in (metric) | 34 290 in (metric) | 35 052 in (metric) | 35 814 in (metric) | 36 576 in (metric) | 37 338 in (metric) | 38 100 in (metric) | 38 862 in (metric) | 39 624 in (metric) | 40 386 in (metric) | 41 148 in (metric) | 41 910 in (metric) | 42 672 in (metric) | 43 434 in (metric) | 44 196 in (metric) | 44 958 in (metric) | 45 720 in (metric) | 46 482 in (metric) | 47 244 in (metric) | 48 006 in (metric) | 48 768 in (metric) | 49 530 in (metric) | 50 292 in (metric) | 51 054 in (metric) | 51 816 in (metric) | 52 578 in (metric) | 53 340 in (metric) | 54 102 in (metric) | 54 864 in (metric) | 55 626 in (metric) | 56 388 in (metric) | 57 150 in (metric) | 57 912 in (metric) | 58 674 in (metric) | 59 436 in (metric) | 60 198 in (metric) | 60 960 in (metric) | 61 722 in (metric) | 62 484 in (metric) | 63 246 in (metric) | 64 008 in (metric) | 64 770 in (metric) | 65 532 in (metric) | 66 294 in (metric) | 67 056 in (metric) | 67 818 in (metric) | 68 580 in (metric) | 69 342 in (metric) | 70 104 in (metric) | 70 866 in (metric) | 71 628 in (metric) | 72 390 in (metric) | 73 152 in (metric) | 73 914 in (metric) | 74 676 in (metric) | 75 438 in (metric) | 76 200 in (metric) |
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 | metric inches | feet | metric inches |
|---|---|---|---|
| 1 | = 762 | 4 | = 3048 |
| 1.5 | = 1143 | 4.5 | = 3429 |
| 2 | = 1524 | 5 | = 3810 |
| 2.5 | = 1905 | 5.5 | = 4191 |
| 3 | = 2286 | 6 | = 4572 |
A metric inch is a nickname for a preferred 1⁄4 subdivision of an ISO 2848 basic module, or 1⁄12 of a metric foot measuring 25 millimetres (0.984 in). A metric inch is 0.4 millimetres (0.016 in) shorter than an inch.
The term was similarly used to refer to the historical Soviet Bloc practice of spacing integrated circuit pins at 1⁄10 of a 25 mm "metric inch" length, instead of the western practice of 1⁄10 of an imperial inch.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| metric inch | in (metric) | = 0.016 in | = 0.0004 m | Metric system SI |
| metric inches | feet | metric inches | feet |
|---|---|---|---|
| 1 | = 0.0013123359580052 | 4 | = 0.005249343832021 |
| 1.5 | = 0.0019685039370079 | 4.5 | = 0.0059055118110236 |
| 2 | = 0.0026246719160105 | 5 | = 0.0065616797900262 |
| 2.5 | = 0.0032808398950131 | 5.5 | = 0.0072178477690289 |
| 3 | = 0.0039370078740157 | 6 | = 0.0078740157480315 |
| feet | metric inches |
|---|---|
| 1 | = 762 |
| 0.0013123 | = 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 …) |