Erg. Unit of measurement of energy or work , belonging to the Cegesimal System of Units ( CGS ), its symbol is erg.


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  • 1 Origin
  • 2 Definition
  • 3 Formulation
  • 4 Equivalence
  • 5 Multiples and submultiples
  • 6 Note on terminology
  • 7 See also
  • 8 Reference
  • 9 Source


Erg is also known as erg. This name is considered to have its origin in the prefix derived from the Greek ergon, which means work and enters the composition of scientific voices. Primarily used in the United States of America , it is considered an outdated unit of measurement.


Unit of energy of the CGS system that is equivalent to the energy transmitted to a body when a force of one dyne is applied to it and it is displaced one centimeter in the direction of force 1 , in the International System of Units (SI), the unit is the joule .


1 erg = 1 din x 1 cm


In other energy units 1 erg corresponds to:

Unit of measurement Symbol Equivalence
joule J 10 -7 J
electron volt eV 6.242 x 10 11 eV
calorie lime 2,390 x 10 -8 cal
kilowatt hour kW.h 2,778 x 10 -14 kW.h
pound foot ft lb 7,376 x 10 -8 ft lb
steam horse hour hp.h 3,725 x 10 -14 hp.h
british thermal unit btu 9.484 x 10 -11

Multiples and submultiples

Value Symbol Name
10 -9 erg nerg nanoergio
10 -6 erg µerg microergium
10 -3 erg merg miliergio
10 3 erg kerg kiloerg
10 6 erg Merg megaerg
10 9 erg Gerg giganergy

Terminology Note

This unit belonging to the Cegesimal System of Units known by the acronym CGS ( centimeter , gram , second) does not come from a person’s own name, so the letters of the symbol are written with lowercase (erg), their name always begins with a lowercase letter (erg), except if you start a phrase or a title.


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