Convert Ton Register (ton reg) to Exaliter (EL) instantly.
About these units
Ton Register (ton reg)
A register ton, or ton register, is a unit of volume, not mass, equal to 100 cubic feet. It is used in maritime contexts to measure the internal capacity of ships—specifically cargo-carrying volume, not weight. Ship registries rely on register tons to calculate taxes, port fees, and cargo classifications. The unit dates back to 19th-century maritime law, where consistent volumetric measurement was critical for international shipping regulation. Despite changes in global trade and containerization, register tons remain important for historical vessel documentation, as well as for understanding older merchant and naval ship specifications.
Exaliter (EL)
An exaliter, equal to 10¹⁸ liters, appears in discussions of planetary-scale volumes, such as estimating water content across extraterrestrial oceans, atmospheric volumes of gas giants, or hydrospheric mass estimates in exoplanet research. Because this unit is so large, it is rarely used in practical Earth-based science except in global summations. However, in cosmology or exoplanet studies, Vast quantities of liquids or gases on super-Earths or ocean worlds may be expressed in EL to maintain manageable numeric magnitudes. The exaliter represents the outer limits of volumetric units still grounded in physical application rather than purely abstract scaling.