| Roman inch | |
|---|---|
| Unit system | Roman |
| Unit of | length |
| Symbol | 𐆑 |
| Conversions | |
| 1 𐆑 in ... | ... is equal to ... |
| SI base units | 24.6 mm |
| U.S. customary | 0.97 in |
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.
The Roman inch was equal to 1⁄12 of a Roman foot (pes), which was standardized under Agrippa to about 0.97 inches or 24.6 millimeters.
The Roman ounce was 1⁄12 of a Roman pound.
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