View source for Order of magnitude

==English==
{{wikipedia}}
{{examples|width=50%|examples=Something that is 2 orders of magnitude larger is 100 times larger, something that is 3 orders of magnitude larger is 1000 times larger, and something that is 6 orders of magnitude larger is a million times larger, because <math>10^2</math> = 100, <math>10^3</math> = 1000, and <math>10^6</math> = a million.
}}

===Etymology===
18th century, in the sense "magnitude (brightness class) of a star", informed by the Greek {{m|grc|[[τῶν]] [[μεγάλων]] [[τάξις]]}} (Ptolemy).

===Noun===
{{en-noun|orders of magnitude}}

# {{lb|en|mathematics}} The class of scale or [[magnitude]] of any amount, where each class contains values of a fixed ratio (most often 10) to the class preceding it.
#: {{syn|en|OOM<id:order of magnitude><qq:initialism>}}
#: {{hyper|en|order<id:size or scope>|scale<id:size or scope>}}
#* '''2011''', [[w:Enrico Fermi|Enrico Fermi]], [[s:Wikisource:Translations|Wikisource]] (translator), ''[[s:Translation:Electrodynamic and Relativistic Theory of Electromagnetic Mass|Concerning a Contradiction between the Electrodynamic and Relativistic Theory of Electromagnetic Mass]]'', '''1922''', Enrico Fermi, ''Über einen Widerspruch zwischen der elektrodynamischen und relativistischen Theorie der elektromagnetischen Masse'', ''Physikalische Zeitschrift'', v 23, pp 340-344,
#*: However, we notice that although this contraction is of '''order of magnitude''' <math>v^{2}:c^{2}</math>, it changes the most important terms of electromagnetic mass, ''i.e'', the rest mass.
#* {{quote-journal|1=en|year=2019|author=Li Huang; James Lambert|title=Another Arrow for the Quiver: A New Methodology for Multilingual Researchers|journal=Journal of Multilingual and Multicultural Development|doi=10.1080/01434632.2019.1596115|page=8|text=However, this pales to insignificance against the massive volume of spoken language, for with over 500 patrons, any given ''second'' of the lunch hour would result in a spoken word count in the thousands, and the whole lunch hour would see a word count '''orders of magnitude''' larger than 3000.}}

====Translations====
{{trans-top|class of scale}}
* Arabic: {{t-needed|ar}}
* Armenian: {{t-needed|hy}}
* Catalan: {{t|ca|ordre de magnitud|m}}
* Chinese:
*: Mandarin: {{t+|cmn|數量級|tr=shùliàngjí}}
* Dutch: {{t|nl|orde van grootte|f}}
* Esperanto: {{t-needed|eo}}
* Estonian: {{t|et|suurusjärk}}
* Finnish: {{t+|fi|suuruusluokka}}, {{t+|fi|kertaluokka}}
* French: {{t+|fr|ordre de grandeur|m}}
* German: {{t+|de|Größenordnung|f}}
* Hebrew: {{t|he|סדר גודל|alt=סֵדֶר גֹּדֶל|m|tr=séder gódel}}
* Hungarian: {{t+|hu|nagyságrend}}
* Irish: {{t|ga|ord méadaíochta|m}}
* Japanese: {{t+|ja|桁|tr=keta}}
* Korean: {{t|ko|크기 정도(-程度)}}, {{t|ko|크기 자릿수}}
* Norwegian:
*: Bokmål: {{t+|nb|størrelsesorden|m}}
* Polish: {{t|pl|rząd wielkości|m}}
* Portuguese: {{t|pt|ordem de grandeza|f}}
* Spanish: {{t|es|orden de magnitud|m}}
* Swedish: {{t+|sv|storleksordning|c}}
* Tamil: {{t-needed|ta}}
* Thai: {{t|th|อันดับของขนาด}}
* Turkish: {{t|tr|büyüklük mertebesi}}
* Ukrainian: {{t|uk|порядок величини|m}}
* Vietnamese: {{t|vi|bậc độ lớn}}
{{trans-bottom}}

===See also===
* {{l|en|dex}}
* {{l|en|ballpark figure}} {{qualifier|colloquial}}

{{C|en|Mathematics}}