| span | 1 span | 2 span | 3 span | 4 span | 5 span | 6 span | 7 span | 8 span | 9 span | 10 span | 11 span | 12 span | 13 span | 14 span | 15 span | 16 span | 17 span | 18 span | 19 span | 20 span | 21 span | 22 span | 23 span | 24 span | 25 span | 26 span | 27 span | 28 span | 29 span | 30 span | 31 span | 32 span | 33 span | 34 span | 35 span | 36 span | 37 span | 38 span | 39 span | 40 span | 41 span | 42 span | 43 span | 44 span | 45 span | 46 span | 47 span | 48 span | 49 span | 50 span | 51 span | 52 span | 53 span | 54 span | 55 span | 56 span | 57 span | 58 span | 59 span | 60 span | 61 span | 62 span | 63 span | 64 span | 65 span | 66 span | 67 span | 68 span | 69 span | 70 span | 71 span | 72 span | 73 span | 74 span | 75 span | 76 span | 77 span | 78 span | 79 span | 80 span | 81 span | 82 span | 83 span | 84 span | 85 span | 86 span | 87 span | 88 span | 89 span | 90 span | 91 span | 92 span | 93 span | 94 span | 95 span | 96 span | 97 span | 98 span | 99 span | 100 span |
| foot | 0.75 ft | 1.5 ft | 2.25 ft | 3 ft | 3.75 ft | 4.5 ft | 5.25 ft | 6 ft | 6.75 ft | 7.5 ft | 8.25 ft | 9 ft | 9.75 ft | 10.5 ft | 11.25 ft | 12 ft | 12.75 ft | 13.5 ft | 14.25 ft | 15 ft | 15.75 ft | 16.5 ft | 17.25 ft | 18 ft | 18.75 ft | 19.5 ft | 20.25 ft | 21 ft | 21.75 ft | 22.5 ft | 23.25 ft | 24 ft | 24.75 ft | 25.5 ft | 26.25 ft | 27 ft | 27.75 ft | 28.5 ft | 29.25 ft | 30 ft | 30.75 ft | 31.5 ft | 32.25 ft | 33 ft | 33.75 ft | 34.5 ft | 35.25 ft | 36 ft | 36.75 ft | 37.5 ft | 38.25 ft | 39 ft | 39.75 ft | 40.5 ft | 41.25 ft | 42 ft | 42.75 ft | 43.5 ft | 44.25 ft | 45 ft | 45.75 ft | 46.5 ft | 47.25 ft | 48 ft | 48.75 ft | 49.5 ft | 50.25 ft | 51 ft | 51.75 ft | 52.5 ft | 53.25 ft | 54 ft | 54.75 ft | 55.5 ft | 56.25 ft | 57 ft | 57.75 ft | 58.5 ft | 59.25 ft | 60 ft | 60.75 ft | 61.5 ft | 62.25 ft | 63 ft | 63.75 ft | 64.5 ft | 65.25 ft | 66 ft | 66.75 ft | 67.5 ft | 68.25 ft | 69 ft | 69.75 ft | 70.5 ft | 71.25 ft | 72 ft | 72.75 ft | 73.5 ft | 74.25 ft | 75 ft |
A span is the distance measured by a human hand, from the tip of the thumb to the tip of the little finger. In ancient times, a span was considered to be half a cubit. Sometimes the distinction is made between the great span (thumb to little finger) and little span (index finger to little finger).
| 1 spans = 0.75 feet | 4 spans = 3 feet |
| 1.5 spans = 1.125 feet | 4.5 spans = 3.375 feet |
| 2 spans = 1.5 feet | 5 spans = 3.75 feet |
| 2.5 spans = 1.875 feet | 5.5 spans = 4.125 feet |
| 3 spans = 2.25 feet | 6 spans = 4.5 feet |
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.
| 1 feet = 1.3333333333333 spans | 4 feet = 5.3333333333333 spans |
| 1.5 feet = 2 spans | 4.5 feet = 6 spans |
| 2 feet = 2.6666666666667 spans | 5 feet = 6.6666666666667 spans |
| 2.5 feet = 3.3333333333333 spans | 5.5 feet = 7.3333333333333 spans |
| 3 feet = 4 spans | 6 feet = 8 spans |
| 1 spans = 0.75 feet |
| 1 feet = 1.3333333 spans |