| 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 |
| rod | 0.0454545 rd | 0.0909091 rd | 0.1363636 rd | 0.1818182 rd | 0.2272727 rd | 0.2727273 rd | 0.3181818 rd | 0.3636364 rd | 0.4090909 rd | 0.4545455 rd | 0.5 rd | 0.5454545 rd | 0.5909091 rd | 0.6363636 rd | 0.6818182 rd | 0.7272727 rd | 0.7727273 rd | 0.8181818 rd | 0.8636364 rd | 0.9090909 rd | 0.9545455 rd | 1 rd | 1.0454545 rd | 1.0909091 rd | 1.1363636 rd | 1.1818182 rd | 1.2272727 rd | 1.2727273 rd | 1.3181818 rd | 1.3636364 rd | 1.4090909 rd | 1.4545455 rd | 1.5 rd | 1.5454545 rd | 1.5909091 rd | 1.6363636 rd | 1.6818182 rd | 1.7272727 rd | 1.7727273 rd | 1.8181818 rd | 1.8636364 rd | 1.9090909 rd | 1.9545455 rd | 2 rd | 2.0454545 rd | 2.0909091 rd | 2.1363636 rd | 2.1818182 rd | 2.2272727 rd | 2.2727273 rd | 2.3181818 rd | 2.3636364 rd | 2.4090909 rd | 2.4545455 rd | 2.5 rd | 2.5454545 rd | 2.5909091 rd | 2.6363636 rd | 2.6818182 rd | 2.7272727 rd | 2.7727273 rd | 2.8181818 rd | 2.8636364 rd | 2.9090909 rd | 2.9545455 rd | 3 rd | 3.0454545 rd | 3.0909091 rd | 3.1363636 rd | 3.1818182 rd | 3.2272727 rd | 3.2727273 rd | 3.3181818 rd | 3.3636364 rd | 3.4090909 rd | 3.4545455 rd | 3.5 rd | 3.5454545 rd | 3.5909091 rd | 3.6363636 rd | 3.6818182 rd | 3.7272727 rd | 3.7727273 rd | 3.8181818 rd | 3.8636364 rd | 3.9090909 rd | 3.9545455 rd | 4 rd | 4.0454545 rd | 4.0909091 rd | 4.1363636 rd | 4.1818182 rd | 4.2272727 rd | 4.2727273 rd | 4.3181818 rd | 4.3636364 rd | 4.4090909 rd | 4.4545455 rd | 4.5 rd | 4.5454545 rd |
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 = 0.045454545454545 rods | 4 spans = 0.18181818181818 rods |
| 1.5 spans = 0.068181818181818 rods | 4.5 spans = 0.20454545454545 rods |
| 2 spans = 0.090909090909091 rods | 5 spans = 0.22727272727273 rods |
| 2.5 spans = 0.11363636363636 rods | 5.5 spans = 0.25 rods |
| 3 spans = 0.13636363636364 rods | 6 spans = 0.27272727272727 rods |
The rod or perch or pole is a surveyors tool and unit of length equal to 5 1⁄2 yards, 16 1⁄2 feet, 1⁄320 of a statute mile or one-fourth of a surveyor's chain and 5.0292 meters.
| 1 rods = 22 spans | 4 rods = 88 spans |
| 1.5 rods = 33 spans | 4.5 rods = 99 spans |
| 2 rods = 44 spans | 5 rods = 110 spans |
| 2.5 rods = 55 spans | 5.5 rods = 121 spans |
| 3 rods = 66 spans | 6 rods = 132 spans |
| 1 spans = 0.0454545 rods |
| 1 rods = 22 spans |