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.
Yes, "cubit" can be abbreviated as "cb" in various contexts, particularly in fields like architecture and construction. The cubit is an ancient unit of length based on the forearm's length from the elbow to the tip of the middle finger, typically measuring about 18 inches (45.72 cm). However, its use is largely historical, as modern measurements prefer standardized units like meters and feet.
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
The cubit is an ancient unit of measurement that typically represents the length of the forearm, from the elbow to the tip of the middle finger. It varies in size across different cultures and historical periods, generally ranging from about 18 to 22 inches (approximately 45 to 56 centimeters). The cubit was commonly used in ancient architecture and construction, particularly in the building of temples and monuments. Its use has largely been replaced by standardized units of measurement in modern times.
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.