Exa-

Exa- is an SI prefix meaning one quintillion.SI brochure, Section 3.1 on BIPM site The name comes from Greek "ex" meaning six.
The reciprocal of this prefix is atto-, from Danish "atten" meaning eighteen.
==Prefix Conversion==
Exa- + Kilo- = Zetta-
== Sources ==
== See also ==
Category:Prefixes
Category:SI prefixes