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The prefixes deci-and centi-, and less frequently hecto-and deca-, are generally used for informal purposes; the centimetre (cm) is especially common. Some modern building codes require that the millimetre be used in preference to the centimetre, because "use of centimetres leads to extensive usage of decimal points and confusion". [ 10 ]
deci centi milli micro nano pico femto atto zepto yocto ronto quecto; Prefix symbol d c m μ n p f a z y r q Factor 10 0: 10 −1: 10 −2: 10 −3: 10 −6: 10 −9: ...
deci d 0.1 10 −1: centi c 0.01 10 −2: milli m 0.001 10 −3: micro μ 0.000 001: 10 −6: nano n 0.000 000 001: 10 −9: pico p 0.000 000 000 001: 10 −12:
The prefixes of the metric system, such as kilo and milli, represent multiplication by positive or negative powers of ten. In information technology it is common to use binary prefixes, which are based on powers of two. Historically, many prefixes have been used or proposed by various sources, but only a narrow set has been recognised by ...
deci d 0.1 10 −1: centi c 0.01 10 −2: milli m 0.001 10 −3: micro u 0.000 001: 10 −6: nano n 0.000 000 001: 10 −9: pico p 0.000 000 000 001: 10 −12: femto f 0.000 000 000 000 001: 10 −15: atto a 0.000 000 000 000 000 001: 10 −18: zepto z 0.000 000 000 000 000 000 001: 10 −21: yocto y 0.000 000 000 000 000 000 000 001: 10 −24
deci: d: 10 −1: 0.1: 1795 centi: c: 10 −2: 0.01 milli: m: 10 −3: 0.001 micro: μ: 10 −6: 0.000 001: 1873 nano: n: 10 −9: 0.000 000 001: 1960 pico: p: 10 −12: 0.000 000 000 001: femto: f: 10 −15: 0.000 000 000 000 001: 1964 atto: a: 10 −18: 0.000 000 000 000 000 001: zepto: z: 10 −21: 0.000 000 000 000 000 000 001: 1991 yocto ...
pico- (p) 0.000 000 000 001: 10 −12: −12 billionth nano- (n) 0.000 000 001: 10 −9: −9 millionth micro- 0.000 001: 10 −6: −6 thousandth milli- (m) 0.001 10 −3: −3 hundredth centi- (c) 0.01 10 −2: −2 tenth deci- (d) 0.1 10 −1: −1 one 1 10 0: 0 ten deca-(da) 10 10 1: 1 hundred hecto- (h) 100 10 2: 2 thousand kilo- (k) 1000: ...
deci d 10 −1: 0.1 centi c 10 −2: 0.01 milli m 10 −3: 0.001 micro μ 10 −6: 0.000 001: nano n 10 −9: 0.000 000 001: pico p 10 −12: 0.000 000 000 001: femto f 10 −15: 0.000 000 000 000 001: atto a 10 −18: 0.000 000 000 000 000 001: zepto: z 10 −21: 0.000 000 000 000 000 000 001: yocto y 10 −24: 0.000 000 000 000 000 000 000 001