Editing Second (section)

== SI multiples ==
{{main|Orders of magnitude (time)}}
[[SI prefix]]es are commonly used for times shorter than one second, but rarely for multiples of a second. Instead, certain [[Non-SI units mentioned in the SI|non-SI units are permitted for use with SI]]: [[minute]]s, [[hour]]s, [[day]]s, and in astronomy [[Julian year (astronomy)|Julian year]]s.<ref name=IAU>{{cite web
 |url         = http://www.iau.org/Units.234.0.html
 |title       = Recommendations Concerning Units
 |access-date  = February 18, 2007
 |author      = International Astronomical Union
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20070216041250/http://www.iau.org/Units.234.0.html
 |archive-date = February 16, 2007
}} Reprinted from the "IAU Style Manual" by G.A. Wilkinson, Comm. 5, in IAU Transactions XXB (1987).</ref>
{| class="wikitable"
|+SI multiples for second (s)
! colspan="3" |Submultiples
| rowspan="14" |
! colspan="4" |Multiples
|-
!Value
!SI symbol
!Name
!Value
!SI symbol
!Name
!Equivalent to
|-
|10<sup>−1</sup> s
|ds
|decisecond
|10<sup>1</sup> s
|das
|decasecond
|10 seconds
|-
|10<sup>−2</sup> s
|cs
|centisecond
|10<sup>2</sup> s
|hs
|hectosecond
|1 minute, 40 seconds
|-
|10<sup>−3</sup> s
|ms
|[[millisecond]]
|10<sup>3</sup> s
|ks
|kilosecond
|16 minutes, 40 seconds
|-
|10<sup>−6</sup> s
|μs
|[[microsecond]]
|10<sup>6</sup> s
|Ms
|megasecond
|1 week, 4 days, 13 hours, 46 minutes, 40 seconds
|-
|10<sup>−9</sup> s
|ns
|[[nanosecond]]
|10<sup>9</sup> s
|Gs
|gigasecond
|31.7 years 
|-
|10<sup>−12</sup> s
|ps
|[[picosecond]]
|10<sup>12</sup> s
|Ts
|terasecond
|31,700 years
|-
|10<sup>−15</sup> s
|fs
|[[femtosecond]]
|10<sup>15</sup> s
|Ps
|petasecond
|31.7 million years
|-
|10<sup>−18</sup> s
|as
|[[attosecond]]
|10<sup>18</sup> s
|Es
|exasecond
|31.7 billion years
|-
|10<sup>−21</sup> s
|zs
|zeptosecond
|10<sup>21</sup> s
|Zs
|zettasecond
|31.7 trillion years
|-
|10<sup>−24</sup> s
|ys
|yoctosecond
|10<sup>24</sup> s
|Ys
|yottasecond
|31.7 quadrillion years
|-
|10<sup>−27</sup> s
|rs
|rontosecond
|10<sup>27</sup> s
|Rs
|ronnasecond
|31.7 quintillion years
|-
|10<sup>−30</sup> s
|qs
|quectosecond
|10<sup>30</sup> s
|Qs
|quettasecond
|31.7 sextillion years
|}