Convert long cubit to fathom (US survey) Online | Free Length Converter

Switch units
   

Long Cubit


The long cubit is an ancient unit of length that is a variation of the standard cubit, measuring from the elbow to the tip of the middle finger. The long cubit is longer than the common cubit, typically about 21 inches (approximately 53 centimeters).


It was used in ancient civilizations such as Egypt and Mesopotamia for construction, land measurement, and crafts, especially when more precision or a larger unit was needed.


Key points:



  • Long cubit ≈ 21 inches (53 cm)



  • Longer than the standard cubit (usually about 18 inches)



  • Used in ancient architecture and surveying



  • Provided a larger base unit for measurements in construction



The long cubit helped ancient builders and surveyors manage larger scales while still relying on the human body as a reference.


Fathom (US Survey)


The fathom (US survey) is a unit of length used in U.S. surveying and nautical contexts, defined as exactly 6 US survey feet. Since one US survey foot is approximately 0.3048006096 meters, the US survey fathom measures about 1.828804 meters.


Like the international fathom, it is primarily used to measure water depths and underwater distances in marine navigation and surveying.


Key details:



  • 1 US survey fathom = 6 US survey feet



  • 1 US survey fathom ≈ 1.828804 meters



  • 1 fathom = 2 yards



Though the difference between the US survey fathom and the international fathom is very small, the US survey units are being phased out in favor of international standards, but they still appear in some legal and historical surveying documents.




No conversions available for length.

Convert long cubit to Other Length Units