Orders of magnitude (time)
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| Factor (s) | Multiple | common units | orders of magnitude |
|---|---|---|---|
| 10−44 | Planck time, the shortest physically meaningful instant of time ≈ 5.4Template:E s | 10−44 s | |
| 10−24 | 1 yoctosecond | -- | 1 ys, 10 ys, 100 ys |
| 10−21 | 1 zeptosecond | -- | 1 zs, 10 zs, 100 zs |
| 10−18 | 1 attosecond | -- | 1 as, 10 as, 100 as |
| 10−15 | 1 femtosecond | -- | 1 fs, 10 fs, 100 fs |
| 10−12 | 1 picosecond | -- | 1 ps, 10 ps, 100 ps |
| 10−9 | 1 nanosecond | -- | 1 ns, 10 ns, 100 ns |
| 10−6 | 1 microsecond | sometimes (poorly) abbreviated as "us" or "usec" | 1 µs, 10 µs, 100 µs |
| 10−3 | 1 millisecond | blink of an eye ~ 50 to 80 ms | 1 ms, 10 ms, 100 ms |
| 100 | 1 second | minute = 60 s | 1 s, 10 s, 100 s |
| 103 | 1 kilosecond (16.7 minutes) | hour = 3600 s day = 86 400 s = 86.4 ks week = 604.8 ks | 103 s, 104 s, 105 s |
| 106 | 1 megasecond (11.6 days) | month = 2.6 x 106 s year = 31.6 Ms ~= π x 107 | 106 s, 107 s, 108 s |
| 109 | 1 gigasecond (32 years) | century = 3.16 Gs ≈ πTemplate:E s millennium = 31.6 Gs ≈ πTemplate:E s | 109 s, 1010 s, 1011 s |
| 1012 | 1 terasecond (32 000 years) | --- | 1012 s, 1013 s, 1014 s |
| 1015 | 1 petasecond (32 million years) | 4.3Template:E s ≈ 13.7 billion years, the approximate age of the universe | 1015 s, 1016 s, 1017 s |
| 1018 | 1 exasecond (32 billion years) | -- | 1018 s, 1019 s, 1020 s |
| 1021 | 1 zettasecond (32 trillion years) | -- | 1021 s, 1022 s, 1023 s |
| 1024 | 1 yottasecond (32 quadrillion years) | -- | 1024 s, 1025 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 × 10−44 s.
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