View source for Decimetre

{{short description|Unit of length 1/10 of a metre}}
{{EngvarB|date=November 2023}}
{{Infobox unit
| image    = Cd 3d.png
| caption  = A standard [[Compact disc|CD]] is {{convert|120|mm|dm|abbr=off}} in diameter.
| symbol   = dm
| standard = [[SI]]
| quantity = [[length]]
| units1   = [[SI base units]]
| inunits1 = {{val|0.1|ul=m}}
| units2   = [[imperial units|imperial]]/[[US customary units|US]]&nbsp;units
| inunits2 = {{convert|1|dm|in|disp=out|comma=gaps|lk=on|sigfig=5}}
}}

{{Wiktionary|decimeter}}

The '''decimetre''' (or '''{{lang|en-us|decimeter}}''' in [[American and British English spelling differences#-re, -er|American English]]; symbol: '''dm'''), is a unit of length in the [[International System of Units]], equal to one tenth of a [[metre]], ten [[centimetre]]s, one hundred [[millimetre]]s, and 3.937 [[inch]]es.<ref>{{Cite web|title=decimeter - Dictionary Definition|url=https://www.vocabulary.com/dictionary/decimeter|access-date=2021-01-03|website=Vocabulary.com}}</ref>

The common non-[[International System of Units|SI]] metric unit of volume, the [[litre]], is defined as one cubic decimetre, although, from 1901 to 1964, there was a [[Litre#History|slight difference between the two]] due to the litre being defined using the [[kilogram]] rather than the metre.

Markings of a [[draft (hull)|ship's draft]] are shown in decimetres in most of the world.

==See also==
*[[Metric prefix]]
*[[Deci-]]
*{{section link|Orders_of_magnitude_(length)|1_decimetre}}
*[[Conversion of units]], for comparison with other units of length.

==References==
{{Reflist}}

{{SI units of length}}

[[Category:Metre]]
[[Category:Orders of magnitude (length)|-01]]


{{Unit-measurement-stub}}
[[Category:Units of length]]