
One thousandth of a meter, or 1/25th of an inch. See metric system.
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To convert from millimeters to:
centimeters,
multiply by .1.
feet,
multiply by 3.281E-03.
inches,
multiply by .03937.
kilometers,
multiply by 1E-06.
meters,
multiply by .001.
miles,
multiply by 6.214E-07.
mils,
multiply by 39.37.
yards,
multiply by 1.094E-03.
The world changes according to the way people see it, and if you alter, even by a millimeter, the way . . . people look at reality, then you can change it.
— James Baldwin (1924-1987), American writer and civil rights leader.
Tutor's tip: Note: Measure (volume to the one-thousandth liter) with "milliliter" and distance to the (one-thousandth meter) with "millimeter."
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| millilitre, milligram, milliequivalent | |
| millimetre of mercury, millimicro+, millimicron |
One-thousandth (10−3) of a meter; equivalent to 0.039 inch; abbreviated mm.

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To help compare different orders of magnitude this page lists lengths between 10−3 m and 10−2 m (1 mm and 1 cm).
| Orders of magnitude for length in E notation | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| shorter than one metre: | |||||||||||||||||||||||||
| <−24 | −24 | −23 | −22 | −21 | −20 | −19 | −18 | −17 | −16 | −15 | −14 | −13 | −12 | −11 | −10 | −9 | −8 | −7 | −6 | −5 | −4 | −3 | −2 | −1 | 0 |
| longer than 1 metre: | |||||||||||||||||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 |
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Dansk (Danish)
n. - millimeter
Français (French)
n. - millimètre
Deutsch (German)
n. - Millimeter
Ελληνική (Greek)
n. - χιλιοστόμετρο, χιλιοστό
Português (Portuguese)
n. - milímetro (m)
Español (Spanish)
n. - milímetro
Svenska (Swedish)
n. - millimeter
中文(简体)(Chinese (Simplified))
公厘, 毫米
中文(繁體)(Chinese (Traditional))
n. - 公釐, 毫米
한국어 (Korean)
n. - 밀리미터(1000분의 1미터)
العربيه (Arabic)
(الاسم) مليميتر واحد بالألف من المتر
עברית (Hebrew)
n. - מילימטר (אלפית המטר)
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