length · Ancient Egyptian · Middle Kingdom onward

iteru / river-measure

approx.range

Record: M158
Definition quality: Reconstructed approximate
Conversion mode: range
Calculator: Range only

Definition

Common modern reconstruction: 1 iteru ≈20,000 cubits ≈10.5 km, but historical/local values and derivation remain debated

Documented range

Surviving evidence places one iteru / river-measure between 10,460 and 10,580 metres. It is recorded as a range because the documented values were not uniform.

History & use

UCL presents 20,000 cubits as a working equivalence; modern scholarship notes that how this value was derived is not unquestionable, and historical texts can imply different local values.

Modern use

Modern use is context-dependent and varies by region or measurement system.

Sources & evidence

Source tier — · confidence unknown

Related measurements

metre

length · International · Modern

SI base unit of length. Its definition fixes the speed of light in vacuum at exactly 299,792,458 m/s, with the second defined from the caesium-133 hyperfine frequency.