File:Ruler_with_millimeter_and_centimeter_marks.png · Wikimedia Commons · See Wikimedia Commons

EntityQ174789· pop 92· linked from 1,044 articles

millimetre

Also known as mil, millimetres

thumb|330px|Different lengths with respect to the electromagnetic spectrum. The [[microwave spans from 1 metre to 1 millimetre.]]

AI overview

A millimetre is a unit of length equal to one-thousandth of a metre, making it a very small measurement useful for describing tiny objects and distances. It matters in contexts like science and technology where precision is important, such as in describing the wavelengths of electromagnetic radiation like microwaves.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Unit.name: millimetre
Unit.image: Ruler with millimeter and centimeter marks.png
Unit.caption: Ruler with millimetre and centimetre marks
Unit.standard: SI
Unit.quantity: Length
Unit.symbol: mm
Unit.namedafter: From metric prefix mille (Latin for "one thousand") and the metre
Unit.units1: micrometres
Unit.inunits1: 1000
Unit.units2: centimetres
Unit.units3: metres
Unit.units4: kilometres
Unit.units5: decimetres
Unit.units6: inches
Unit.units7: feet

via Wikipedia infobox

Wikidata facts

Show 7 more facts

conversion to standard unit: 1000000
unit symbol: mm
Unicode character: ㎜
conversion to SI unit: 0.001
Wikidata SPARQL query equivalent: wd:Q174789 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)
short name: мм
Commons category: Millimetre

Sources (4)

via Wikidata · CC0

~2 min read

Article

6 sections

Contents

Definition
Informal terminology
Unicode symbols
Measurement
See also
References

thumb|330px|Different lengths with respect to the electromagnetic spectrum. The [[microwave spans from 1 metre to 1 millimetre.]]

The millimetre (SI symbol: mm; international spelling) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, the SI base unit of length. 1 metre = 1000 millimetres 1 centimetre = 10 millimetres