1 E-9 s 

Look up nanosecond in
Wiktionary, the free dictionary.
Orders of
magnitude (time)

in E notation

Planck time
1 E-25 s
1 E-24 s
1 E-21 s
1 E-18 s
1 E-17 s
1 E-16 s
1 E-15 s
1 E-14 s
1 E-13 s
1 E-12 s
1 E-11 s
1 E-10 s
1 E-9 s
1 E-8 s
1 E-7 s
1 E-6 s
1 E-5 s
1 E-4 s
1 E-3 s
1 E-2 s
1 E-1 s

1 E0 s
1 E1 s
1 E2 s
1 E3 s
1 E4 s
1 E5 s
1 E6 s
1 E7 s
1 E8 s
1 E9 s
1 E10 s
1 E11 s
1 E12 s
1 E13 s
1 E14 s
1 E15 s
1 E16 s
1 E17 s
1 E18 s
1 E19 s and more

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A nanosecond (ns) is one billionth of a second. See also times of other orders of magnitude.

To help compare orders of magnitude of different times this page lists times between 10−9 seconds and 10−8 seconds (1 nanosecond and 10 nanoseconds).

A common computer instruction is 'nanosleep' meaning suspend execution for a length of time given in nanoseconds (for example, http://www.opengroup.org/onlinepubs/007908799/xsh/nanosleep.html)