Giga-

Giga- is an SI prefix meaning one billion.SI brochure, Section 3.1 on BIPM site Its name comes from Greek "gigas", meaning giant.
The reciprocal of this prefix is nano-, from Greek "nanos" meaning dwarf.
==Prefix conversion==
Giga- + Kilo- = Tera-
Giga- + milli-  = mega-
==Example==
* A giga-second equals to around 31.709 years.
* A giga-meter is 1000 megameters or 1 billion kilometers.
== Sources ==
== See also ==
Category:Prefixes
Category:SI prefixes