millimetre
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
Article
6 sectionsContents
- 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