volume · International · Modern
Non-SI unit accepted for use with the SI; 1 L = 1 dm³ = 10⁻³ m³.
Converter
volume · Ancient Egyptian · Middle Kingdom mathematical texts onward
ro
approx.reference-only
- Record
- M163
- Definition quality
- Reconstructed approximate
- Conversion mode
- reference only
- Calculator
- Conversion under review
Definition
1 ro = 1/320 hekat; using 4.8 L hekat → ≈15 mL
Conversion still under review
This historical measurement does not yet have a sufficiently verified conversion or range for Scaleidoscope to present numerically.
History & use
The ro appears in Egyptian mathematical capacity calculations as a very small subdivision of the hekat.
Modern use
Modern use is context-dependent and varies by region or measurement system.
Sources & evidence
Source tier — · confidence high
- Institute of Archaeology, University College London — https://www.ucl.ac.uk/museums-static/digitalegypt/weights/volume.html
- Arnold Buffum Chace, with L. Bull, H. P. Manning and R. C. Archibald; Mathematical Association of America — https://upload.wikimedia.org/wikipedia/commons/7/7b/The_Rhind_Mathematical_Papyrus%2C_Volume_I.pdf
Related measurements
volume · International · Modern
1 mL = 10^-3 L = 10^-6 m³.
volume · International · Modern
Coherent SI derived unit for volume, equal to metre cubed.
fluid ounce (US)
fl oz (US)volume · UK / US · Modern / historical
1 U.S. fluid ounce = 1/128 U.S. gallon = 29.5735295625 mL.
fluid ounce (Imperial)
fl oz (Imp)volume · UK / US · Modern / historical
1 Imperial fluid ounce = 1/160 Imperial gallon = 28.4130625 mL.
cup (US customary)
cup (US)volume · UK / US · Modern / historical
1 U.S. customary cup = 8 U.S. fluid ounces = 236.5882365 mL.
pint (US liquid)
pt (US liq)volume · UK / US · Modern / historical
1 U.S. liquid pint = 1/8 U.S. gallon = 0.473176473 L.
pint (Imperial)
pt (Imp)volume · UK / US · Modern / historical
1 Imperial pint = 1/8 Imperial gallon = 0.56826125 L.