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 |
centimeter | 22.86 cm | 45.72 cm | 68.58 cm | 91.44 cm | 114.3 cm | 137.16 cm | 160.02 cm | 182.88 cm | 205.74 cm | 228.6 cm | 251.46 cm | 274.32 cm | 297.18 cm | 320.04 cm | 342.9 cm | 365.76 cm | 388.62 cm | 411.48 cm | 434.34 cm | 457.2 cm | 480.06 cm | 502.92 cm | 525.78 cm | 548.64 cm | 571.5 cm | 594.36 cm | 617.22 cm | 640.08 cm | 662.94 cm | 685.8 cm | 708.66 cm | 731.52 cm | 754.38 cm | 777.24 cm | 800.1 cm | 822.96 cm | 845.82 cm | 868.68 cm | 891.54 cm | 914.4 cm | 937.26 cm | 960.12 cm | 982.98 cm | 1,005.84 cm | 1,028.7 cm | 1,051.56 cm | 1,074.42 cm | 1,097.28 cm | 1,120.14 cm | 1 143 cm | 1,165.86 cm | 1,188.72 cm | 1,211.58 cm | 1,234.44 cm | 1,257.3 cm | 1,280.16 cm | 1,303.02 cm | 1,325.88 cm | 1,348.74 cm | 1,371.6 cm | 1,394.46 cm | 1,417.32 cm | 1,440.18 cm | 1,463.04 cm | 1,485.9 cm | 1,508.76 cm | 1,531.62 cm | 1,554.48 cm | 1,577.34 cm | 1,600.2 cm | 1,623.06 cm | 1,645.92 cm | 1,668.78 cm | 1,691.64 cm | 1,714.5 cm | 1,737.36 cm | 1,760.22 cm | 1,783.08 cm | 1,805.94 cm | 1,828.8 cm | 1,851.66 cm | 1,874.52 cm | 1,897.38 cm | 1,920.24 cm | 1,943.1 cm | 1,965.96 cm | 1,988.82 cm | 2,011.68 cm | 2,034.54 cm | 2,057.4 cm | 2,080.26 cm | 2,103.12 cm | 2,125.98 cm | 2,148.84 cm | 2,171.7 cm | 2,194.56 cm | 2,217.42 cm | 2,240.28 cm | 2,263.14 cm | 2 286 cm |
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).
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
span | span | ≡ 9 in | = 0.2286 m | Imperial/US |
spans | centimeters | spans | centimeters |
---|---|---|---|
1 | = 22.86 | 4 | = 91.44 |
1.5 | = 34.29 | 4.5 | = 102.87 |
2 | = 45.72 | 5 | = 114.3 |
2.5 | = 57.15 | 5.5 | = 125.73 |
3 | = 68.58 | 6 | = 137.16 |
A centimetre (international spelling as used by the International Bureau of Weights and Measures; symbol cm) or centimeter (American spelling) is a unit of length in the metric system, equal to one hundredth of a metre, centi being the SI prefix for a factor of 1/100 . The centimetre was the base unit of length in the now deprecated centimetre–gram–second (CGS) system of units.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
centimeter | cm | ≡ 1×10-2 m ≡ 0.01 m | ≡ 1×10-2 m ≡ 0.01 m | Metric system SI |
centimeters | spans | centimeters | spans |
---|---|---|---|
1 | = 0.043744531933508 | 4 | = 0.17497812773403 |
1.5 | = 0.065616797900262 | 4.5 | = 0.19685039370079 |
2 | = 0.087489063867017 | 5 | = 0.21872265966754 |
2.5 | = 0.10936132983377 | 5.5 | = 0.2405949256343 |
3 | = 0.13123359580052 | 6 | = 0.26246719160105 |
spans | centimeters |
---|---|
1 | = 22.86 |
0.0437445 | = 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 …) |