Editing Area (section)

===Other units including historical===
{{See also|Category:Units of area}}
There are several other common units for area.  The [[Are (unit)|are]] was the original unit of area in the [[metric system]], with:
* 1 are = 100 square metres
Though the are has fallen out of use, the [[hectare]] is still commonly used to measure land:<ref name=BIPM2006Ch5>{{citation|author= Bureau international des poids et mesures|year= 2006|url= http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf|title= The International System of Units (SI)|version= 8th ed.|access-date= 2008-02-13|url-status= live|archive-url= https://web.archive.org/web/20131105051930/http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf|archive-date= 2013-11-05|at=Chapter 5}}</ref>
* 1 hectare = 100 ares = 10,000 square metres = 0.01 square kilometres
Other uncommon metric units of area include the [[tetrad (unit of area)|tetrad]], the [[hectad]], and the [[Myriad (area)|myriad]].

The [[acre]] is also commonly used to measure land areas, where
* 1 acre = 4,840 square yards = 43,560 square feet.
An acre is approximately 40% of a hectare.

On the atomic scale, area is measured in units of [[Barn (unit)|barns]], such that:<ref name=BIPM2006Ch5/>
* 1 barn = 10<sup>−28</sup> square meters.
The barn is commonly used in describing the cross-sectional area of interaction in [[nuclear physics]].<ref name=BIPM2006Ch5/>

In [[South Asia]] (mainly Indians), although the countries use SI units as official, many South Asians still use traditional units. Each administrative division has its own area unit, some of them have same names, but with different values. There's no official consensus about the traditional units values. Thus, the conversions between the SI units and the traditional units may have different results, depending on what reference that has been used.<ref>{{Cite web |date=2020-08-04 |title=Land Measurement Units in India: Standard Measurement Units, Land Conversion Table |url=https://www.magicbricks.com/blog/land-measurements-units-india/115035.html |access-date=2023-09-20 |website=Magicbricks Blog |language=en}}</ref><ref>{{Cite web |last=Mishra |first=Sunita |date=2023-06-13 |title=Land is measured in what units in India: All Types In 2023 |url=https://housing.com/news/local-land-measurement-units-in-india/ |access-date=2023-09-20 |website=Housing News |language=en-GB}}</ref><ref>{{Cite web |title=Standard Land Measurement Units in India - Times Property |url=https://timesproperty.com/news/post/standard-land-measurement-units-in-india-blid1681 |access-date=2023-09-20 |website=timesproperty.com}}</ref><ref>{{Cite web |last=www.clicbrics.com |title=9 Land Measurement Units in India You Must Know - 2022 |url=https://www.clicbrics.com/blog/land-measurement-units |access-date=2023-09-20 |website=www.clicbrics.com |language=en}}</ref>

Some traditional South Asian units that have fixed value:
* 1 Killa = 1 acre
* 1 Ghumaon = 1 acre
* 1 Kanal = 0.125 acre (1 acre = 8 kanal)
* 1 Decimal = 48.4 square yards
* 1 Chatak = 180 square feet