{{short description|SI unit of length}} {{infobox unit | name = hectometre | image = File:Kheops-Pyramid.jpg | caption = The Great Pyramid of Giza is 137.7 metres high, which is 1.377 hectometres. | symbol = hm | standard = SI | quantity = length | units1 = SI base units | inunits1 = {{val|100|ul=m}} | units2 = imperial/US units | inunits2 = {{convert|1|hm|ft|disp=out|lk=on|sigfig=5}} }} The '''hectometre''' (SI symbol: '''hm'''), spelt '''hectometer''' in American English, is a unit of length in the International System of Units (SI), equal to one hundred metres<ref>{{Cite web|url=https://www.oxfordlearnersdictionaries.com/definition/english/hectometre|title=hectometre noun – Definition, pictures, pronunciation and usage notes {{!}} Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com|website=www.oxfordlearnersdictionaries.com|language=en|access-date=2018-07-10}}</ref> and to one tenth of a kilometre. The word comes from a combination of "metre" and the SI prefix "hecto-", meaning "hundred".<ref>{{Cite web|url=https://www.unc.edu/~rowlett/units/prefixes.html|archive-url=https://web.archive.org/web/20180419192722/https://www.unc.edu/~rowlett/units/prefixes.html|url-status=dead|archive-date=2018-04-19|title=Metric and SI Unit Prefixes|website=www.unc.edu|access-date=2018-07-10}}</ref> It is not commonly used in English.{{cn|date=March 2020}} A football field (either soccer or American football) is approximately 1 hectometre in length.<ref>{{Cite web|url=https://www.sportscourtdimensions.com/soccer/|title=Soccer (FIFA) Field Dimensions & Layout – SportsCourtDimensions.com|website=www.sportscourtdimensions.com|language=en-US|access-date=2018-07-10}}</ref><ref>{{Cite web|url=http://www.courtdimensions.net/soccer-field/|title=Soccer Field Dimensions & Measurements|website=www.courtdimensions.net|access-date=2018-07-10}}</ref> The hectare (ha), a common metric unit for land area, is equal to one square hectometre (hm<sup>2</sup>).
The hectometre has sometimes been used for expressing the distance to a target in warfare.<ref>{{Cite web |last=Lienau |first=Peter |date=1999-10-22 |title=The Working Environment for German Warship design in WWI and WWII |url=http://www.navweaps.com/index_tech/tech-044.php |website=NavWeaps}}</ref><ref>{{Cite web|url=https://www.scribd.com/document/109806560/Field-Artillery-Journal-Sep-1927|title=Field Artillery Journal – Sep 1927 | PDF | Shell (Projectile) | Howitzer|website=Scribd}}</ref><ref>{{Cite web|url=https://www.usni.org/magazines/proceedings/1956/january/sinking-scharnhorst|title=The Sinking Of The Scharnhorst | Proceedings – January 1956 Vol. 82/1/635}}</ref>
== See also == * Orders of magnitude (length) * Conversion of units
== References == {{reflist}}
== External links == * {{wiktionary-inline|hectometre}}
{{SI units of length}}
{{DEFAULTSORT:Hectometre}} +02 Category:Metre