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hecto kilo mega giga tera peta exa zetta yotta ronna quetta; Prefix symbol da h k M G T P E Z Y R Q Factor 10 0: 10 1: 10 2: 10 3: 10 6: 10 9: 10 12: 10 15: 10 18: 10 ...
The SI symbols for kilometre, kilogram, and kilowatt, for instance, are km, kg, and kW, respectively. (The symbol for kilo- is k.) Except for the early prefixes of kilo-, hecto-, and deca-, the symbols for the prefixes for multiples are uppercase letters, and those for the prefixes for submultiples are lowercase letters. [8]
According to these standards, kilo, mega, giga, et seq. should only be used in the decimal sense, even when referring to data storage capacities: kilobyte and megabyte denote one thousand and one million bytes respectively (consistent with the metric system), while terms such as kibibyte, mebibyte and gibibyte, with symbols KiB, MiB and GiB ...
Prefix Symbol Factor Power tera T 1 000 000 000 000: 10 12: giga G 1 000 000 000: 10 9: mega M 1 000 000: 10 6: kilo k 1 000: 10 3: hecto h 100 10 2: deca da 10 10 1 (none) (none) 1 10 0: deci d 0.1 10 −1 ...
Several technical numerical prefixes are not derived from words for numbers. (mega-is not derived from a number word, for example.) Similarly, some are only derived from words for numbers inasmuch as they are word play. (Peta-is word play on penta-, for example. See its etymology for details.)
hecto hundred hundred 10 3: kilo thousand thousand 10 6: mega million million 10 9: giga billion or milliard milliard 10 12: tera trillion billion 10 15: peta quadrillion billiard 10 18: exa quintillion trillion 10 21: zetta sextillion trilliard 10 24: yotta septillion quadrillion 10 27: ronna octillion quadrilliard 10 30: quetta nonillion ...
Hecto (symbol: h) is a decimal unit prefix in the metric system denoting a factor of one hundred. It was adopted as a multiplier in 1795, and comes from the Greek ἑκατόν hekatón, meaning "hundred". In 19th century English it was sometimes spelled "hecato", in line with a puristic opinion by Thomas Young.
A binary prefix is a unit prefix that indicates a multiple of a unit of measurement by an integer power of two.The most commonly used binary prefixes are kibi (symbol Ki, meaning 2 10 = 1024), mebi (Mi, 2 20 = 1 048 576), and gibi (Gi, 2 30 = 1 073 741 824).