Orders of magnitude
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SI – SI base units – SI derived units – SI prefixes – conversion of units

Orders of magnitude (time)

Powers of 103 seconds	equal to...	common units	orders of magnitude
10-24 s	1 yoctosecond	--	1 ys, 10 ys, 100 ys
10-21 s	1 zeptosecond	--	1 zs, 10 zs, 100 zs
10-18 s	1 attosecond	--	1 as, 10 as, 100 as
10-15 s	1 femtosecond	--	1 fs, 10 fs, 100 fs
10-12 s	1 picosecond	--	1 ps, 10 ps, 100 ps
10-9 s	1 nanosecond	--	1 ns, 10 ns, 100 ns
10-6 s	1 microsecond	--	1 µs, 10 µs, 100 µs
10-3 s	1 millisecond	--	1 ms, 10 ms, 100 ms
1 s	1 second	minute = 60 s	1 s, 10 s, 100 s
103seconds (1000 seconds)	1 kilosecond (16.7 minutes)	hour = 3600 s day = 86 400 s	103 s , 104 s , 105 s
106 seconds (1 million seconds)	1 megasecond (11.6 days)	month = 2.6 x 106 s year ~= π x 107 s	106 s , 107 s , 108 s
109 seconds (1000 million seconds)	1 gigasecond (32 years)	century ~= π x 109 s millennium ~= π x 1010 s	109 s , 1010 s , 1011 s
1012 seconds	1 terasecond (32 000 years)	---	1012 s , 1013 s , 1014 s
1015 seconds	1 petasecond (32 million years)	--	1015 s , 1016 s , 1017 s
1018 seconds	1 exasecond (32 billion years)	--	1018 s , 1019 s and more

The pages linked in the right-hand column contain lists of times that are of the same order of magnitude (power of ten). Rows in the table represent increasing powers of a thousand (3 orders of magnitude)

Note: Planck time, the shortest physically meaningful instant of time, is approximately 5.4 x 10^-44 s.

See also

• SI
• SI prefixes
• SI base units
• units
• time
• orders of magnitude
• Logarithmic timeline
• Human's periods

• orders of magnitude (length)
• orders of magnitude (area)
• orders of magnitude (volume)
• orders of magnitude (mass)

• Planck units
• Wikipedia:size comparisons