Second - SI Multiples

SI Multiples

SI prefixes are commonly used to measure time less than a second, but rarely for multiples of a second (which is known as metric time). Instead, the non-SI units minutes, hours, days, Julian years, Julian centuries, and Julian millennia are used.

SI multiples for second (s)
Submultiples Multiples
Value Symbol Name Value Symbol Name
10−1 s ds decisecond 101 s das decasecond
10−2 s cs centisecond 102 s hs hectosecond
10−3 s ms millisecond 103 s ks kilosecond
10−6 s µs microsecond 106 s Ms megasecond
10−9 s ns nanosecond 109 s Gs gigasecond
10−12 s ps picosecond 1012 s Ts terasecond
10−15 s fs femtosecond 1015 s Ps petasecond
10−18 s as attosecond 1018 s Es exasecond
10−21 s zs zeptosecond 1021 s Zs zettasecond
10−24 s ys yoctosecond 1024 s Ys yottasecond
Common prefixes are in bold

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