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The prefix milli-, likewise, may be added to metre to indicate division by one thousand; one millimetre is equal to one thousandth of a metre. Decimal multiplicative prefixes have been a feature of all forms of the metric system, with six of these dating back to the system's introduction in the 1790s. Metric prefixes have also been used with ...
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: 10 −12: ...
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
A unit prefix is a specifier or mnemonic that is added to the beginning of a unit of measurement to indicate multiples or fractions of the units. Units of various sizes are commonly formed by the use of such prefixes.
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: y: 10 −24: 0.000 000 000 000 000 000 000 001 ...
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: y: 10 −24: 0.000 000 000 000 000 000 000 001 ...
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
deci-, centi-, milli-, micro-, nano-, pico-, femto-, atto-in descending order of magnitude: D arn C lever M nemonic M akes N o P refix F orgettable, A bsolutely [ 50 ] [ dead link ] See also