›› Measurement unit: inch

Full name: inch

Plural form: inches

Symbol: in

Category type: length

Scale factor: 0.0254


›› SI unit: metre

The SI base unit for length is the metre.
1 metre is equal to 39.3700787402 inch.


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›› Definition: Inch

An inch is the name of a unit of length in a number of different systems, including Imperial units, and United States customary units. There are 36 inches in a yard and 12 inches in a foot. The inch is usually the universal unit of measurement in the United States, and is widely used in the United Kingdom, and Canada, despite the introduction of metric to the latter two in the 1960s and 1970s, respectively. The inch is still commonly used informally, although somewhat less, in other Commonwealth nations such as Australia; an example being the long standing tradition of measuring the height of newborn children in inches rather than centimetres. The international inch is defined to be equal to 25.4 millimeters.


›› Sample conversions: inch

inch to arpent [France]
inch to micrometre
inch to mile [nautical, UK]
inch to siriometre
inch to ell [Scotland]
inch to span
inch to pouce
inch to pace [Roman]
inch to light month
inch to wah [Thailand]