Uncia (unit)
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Uncia Unit
Roman inch
Unit systemRoman
Unit oflength
SI base units24.6 mm
U.S. customary0.97 in

The uncia (plural: unciae) was a Roman unit of length, weight, and volume. It survived as the Byzantine liquid ounce (Greek: , oungía) and the origin of the English inch, ounce, and fluid ounce.

The Roman inch was equal to 112 of a Roman foot (pes), which was standardized under Agrippa to about 0.97 inches or 24.6 millimeters.[]

The Roman ounce was 112 of a Roman pound.

See also


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