Atto
Updated: 12/10/2023 by Computer Hope
Atto (a) is a prefix used with the metric system that stands for 0.000000000000000001, or 10 to the -18th power.
What is smaller than an atto?
With SI prefixes, zepto is smaller than atto.
What is larger than an atto?
With SI prefixes, femto is larger than atto.
What is atto's non-decimal equivalent?
An exa (E) is the prefix used for 1018.
A, Measurements, SI