time units

year 31536000.0 s
day     86400.0 s
hour     3600.0 s
minute     60.0 s
second      1.0 s
centisecond 0.01 cs (hundredth)
millisecond 0.001 ms (thousandth)
microsecond 0.000001 µs (millionth)
nanosecond  0.000000001 ns (billionth) *
picosecond  0.000000000001 ps (trillionth)
femtosecond 0.000000000000001 fs
attosecond  0.000000000000000001 as
zeptosecond 0.000000000000000000001 zs
yoctosecond 0.000000000000000000000001 ys

* In one nanosecond, electricity travels approximately one foot through wire.