# nano (n)

Nano (n) is the prefix for one billionth. In decimal notation it is zero with 9 digits behind the decimal point: 0.000.000.001, in exponential notation it is: `10^-9`.

The prefix nano is defined like all other mathematical prefixes in the SystÃ¨me International( SI) and is used for the indication of the size of capacities, for time-related indications and for the structure density of conductor paths on integrated circuits( IC).