centimeter | 1 cm | 2 cm | 3 cm | 4 cm | 5 cm | 6 cm | 7 cm | 8 cm | 9 cm | 10 cm | 11 cm | 12 cm | 13 cm | 14 cm | 15 cm | 16 cm | 17 cm | 18 cm | 19 cm | 20 cm | 21 cm | 22 cm | 23 cm | 24 cm | 25 cm | 26 cm | 27 cm | 28 cm | 29 cm | 30 cm | 31 cm | 32 cm | 33 cm | 34 cm | 35 cm | 36 cm | 37 cm | 38 cm | 39 cm | 40 cm | 41 cm | 42 cm | 43 cm | 44 cm | 45 cm | 46 cm | 47 cm | 48 cm | 49 cm | 50 cm | 51 cm | 52 cm | 53 cm | 54 cm | 55 cm | 56 cm | 57 cm | 58 cm | 59 cm | 60 cm | 61 cm | 62 cm | 63 cm | 64 cm | 65 cm | 66 cm | 67 cm | 68 cm | 69 cm | 70 cm | 71 cm | 72 cm | 73 cm | 74 cm | 75 cm | 76 cm | 77 cm | 78 cm | 79 cm | 80 cm | 81 cm | 82 cm | 83 cm | 84 cm | 85 cm | 86 cm | 87 cm | 88 cm | 89 cm | 90 cm | 91 cm | 92 cm | 93 cm | 94 cm | 95 cm | 96 cm | 97 cm | 98 cm | 99 cm | 100 cm |
span | 0.0437445 span | 0.0874891 span | 0.1312336 span | 0.1749781 span | 0.2187227 span | 0.2624672 span | 0.3062117 span | 0.3499563 span | 0.3937008 span | 0.4374453 span | 0.4811899 span | 0.5249344 span | 0.5686789 span | 0.6124234 span | 0.6561680 span | 0.6999125 span | 0.7436570 span | 0.7874016 span | 0.8311461 span | 0.8748906 span | 0.9186352 span | 0.9623797 span | 1.0061242 span | 1.0498688 span | 1.0936133 span | 1.1373578 span | 1.1811024 span | 1.2248469 span | 1.2685914 span | 1.3123360 span | 1.3560805 span | 1.3998250 span | 1.4435696 span | 1.4873141 span | 1.5310586 span | 1.5748031 span | 1.6185477 span | 1.6622922 span | 1.7060367 span | 1.7497813 span | 1.7935258 span | 1.8372703 span | 1.8810149 span | 1.9247594 span | 1.9685039 span | 2.0122485 span | 2.0559930 span | 2.0997375 span | 2.1434821 span | 2.1872266 span | 2.2309711 span | 2.2747157 span | 2.3184602 span | 2.3622047 span | 2.4059493 span | 2.4496938 span | 2.4934383 span | 2.5371829 span | 2.5809274 span | 2.6246719 span | 2.6684164 span | 2.7121610 span | 2.7559055 span | 2.7996500 span | 2.8433946 span | 2.8871391 span | 2.9308836 span | 2.9746282 span | 3.0183727 span | 3.0621172 span | 3.1058618 span | 3.1496063 span | 3.1933508 span | 3.2370954 span | 3.2808399 span | 3.3245844 span | 3.3683290 span | 3.4120735 span | 3.4558180 span | 3.4995626 span | 3.5433071 span | 3.5870516 span | 3.6307962 span | 3.6745407 span | 3.7182852 span | 3.7620297 span | 3.8057743 span | 3.8495188 span | 3.8932633 span | 3.9370079 span | 3.9807524 span | 4.0244969 span | 4.0682415 span | 4.1119860 span | 4.1557305 span | 4.1994751 span | 4.2432196 span | 4.2869641 span | 4.3307087 span | 4.3744532 span |
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 |
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 |
centimeters | spans |
---|---|
1 | = 0.0437445 |
22.86 | = 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 …) |