Cubit units have not been in serious use for at least 1000 years!
About 17 inches...
A cubit and a footstep are a type of archaic unit of length that was mostly used during the Middle Ages. It is not used as a standard unit of length today because they were not proven to be consistant lengths.
Some units include the "hand" (horses) and the "span" (great span) originally equal to half of a Roman cubit.
The ancient Egyptian units of measurement were called cubit, palm, and digit. These units were used to measure length in ancient Egypt.
They are the litre or a cubic metre (= 1000 litres).
it is cubit
Square feet are a measure of area. A square is a flat thing with no vokume. Cubit feet don't exist. Cubic feet are a measure of volume. There is no way of expressing a volume in units of area.
China
A foot is a unit of length. A cubic yard is a unit of volume. The two units are therefore incompatible.
18 inches are in a cubit.
Yard is about double a cubit....
1 cubit is about 19.7 inches.