exagram [Eg] Unit Converter

Definition of exagram [Eg] unit

An exagram (Eg) is a metric unit of mass equal to 10^18 grams, or 10^15 kilograms. It is one quintillion grams and belongs to the International System of Units using SI prefixes.

History of exagram [Eg] unit

The exagram derives from the metric system, whose gram originated in late eighteenth-century France as a practical mass unit. The prefix “exa-” was introduced into the International System of Units in 1975, when the 15th General Conference on Weights and Measures adopted a set of prefixes extending from extremely small to extremely large quantities. Exa comes from the Greek héx, meaning “six,” indicating six powers of ten beyond kilo in the prefix sequence. Although rarely encountered historically, it provides a standardized name for extraordinarily large masses.

Applications of exagram [Eg] unit

Exagrams are mainly used in theoretical science, planetary studies, astrophysics, and discussions of global or geological mass quantities. A single exagram equals one quadrillion kilograms, making it suitable for describing the mass of large asteroids, planetary bodies, or immense amounts of material. In everyday commerce and measurement, the unit is impractical; scientists generally use kilograms, tonnes, or gigatonnes instead.

Complete list of exagram [Eg] unit conversion