Uncia (unit)

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

Roman inch
Unit systemRoman
Unit oflength
1 𐆑 in ...... is equal to ...
   SI base units   24.6 mm
   U.S. customary   0.97 in

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.[citation needed]

The Roman ounce was 112 of a Roman pound.

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