The distinctive point
Egyptian ro: a value with room for evidence
The distinctive point is the uncertainty, not just the headline magnitude. The matrix carries ± 0.001 L and names the basis as one-320th-heqat. That keeps comparison possible without pretending that every specimen, survey, or period produced one perfect constant.
Basis: one-320th-heqat. Check the record source.
- largerEgyptian dja1/20 of Egyptian dja
What this unit was
Egyptian ro is modelled here as a liquid standard of the Egyptian tradition, associated with Egypt during Old and Middle Kingdom representative. The converter represents one ro as 0.015 L; its basis is one-320th-heqat. The matrix carries an indicative uncertainty of ± 0.001 L.
Within that setting, the unit belonged to a working system for storage, rations, trade, and the circulation of drink or other commodities. It should be read with its period, locality, and evidential basis attached, not as a universal value shared by every culture using a similar name. A vessel name is not automatically the capacity of every surviving vessel.
Evidence of use and sources
The working value is traceable to UCL Digital Egypt, volume. Its record is classified as medium confidence and uses the stated basis rather than an assumed culture-wide constant.
Three directly pertinent excerpts from the supplied library are available.
“pottery measures ... cannot be made exact”
Flinders Petrie, Ancient Weights and Measures, PDF p. 41. material limitation
“Only measures of metal ... or of stone, can be accepted as good definitions.”
Flinders Petrie, Ancient Weights and Measures, PDF p. 41. evidence hierarchy
“Several different standards may be expected among capacity measures.”
Flinders Petrie, Ancient Weights and Measures, PDF p. 41. coexisting capacity systems
Working definition
Egyptian ro is represented as a Egyptian standard associated with Egypt during Old and Middle Kingdom representative.
The converter uses 0.015 L per unit with indicative matrix uncertainty ± 0.001 L.
How to use it
Basis: one-320th-heqat; confidence: medium. A shared historical name does not make this value portable to another period or polity.
Open this unit in the Liquid converter · Return to all units