inch
Sign in to saveThe inch (symbol: in or prime (symbol)|) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to yard or of a foot. Derived from the Roman uncia ("twelfth"), the word inch is also sometimes used to translate similar units in other measurement systems, usually understood as deriving from the width of the human thumb.
AI overview
An inch is a unit of length used in British Imperial and U.S. customary measurement systems, equal to one-twelfth of a foot. The term comes from the Roman word for "twelfth" and is sometimes used to describe similar units in other measurement systems, traditionally understood as roughly the width of a human thumb.
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Key facts
- Unit.quantity
- Length
- Unit.image
- Inch tape (cropped).jpg
- Unit.caption
- A measuring tape with inches
- Unit.symbol
- in
- Unit.symbol2
- (the double prime)
- Unit.standard
- Imperial/US units
- Unit.units2
- Metric (SI) units
- Unit.inunits2
- 25.4 mm
- Unit.units1
- Imperial/US units
- Unit.inunits1
- yd or ft
via Wikipedia infobox
Article
16 sectionsContents
- Name
- Usage
- Imperial or hybrid countries
- Worldwide
- Technical details
- Equivalents
- History
- Related units
- US survey inches
- Continental inches
- Scottish inch
- See also
- Notes
- References
- Citations
- Bibliography
The inch (symbol: in or prime (symbol)|) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to yard or of a foot. Derived from the Roman uncia ("twelfth"), the word inch is also sometimes used to translate similar units in other measurement systems, usually understood as deriving from the width of the human thumb.
Standards for the exact length of an inch have varied in the past, but since the adoption of the international yard during the 1950s and 1960s the inch has been based on the metric system and defined as exactly 25.4mm.