Search notes:

Prefixes for Data Units

Short scale Long scale Comments
10⁻⁶³ lunto l
10⁻⁶⁰ mikto mi
10⁻⁵⁷ nekto nk
10⁻⁵⁴ otro o
10⁻⁵¹ pekro pk
10⁻⁴⁸ quekto q
10⁻⁴⁵ rimto r
10⁻⁴² sotro s
10⁻³⁹ trekto td
10⁻³⁶ unto u
10⁻³³ vunkto v
10⁻³⁰ quecto (wekto?) q (w?) Added 2022.
10⁻²⁷ ronto (xonto?) r (x?) Added 2022.
10⁻²⁴ yocto y
10⁻²¹ zepto z
10⁻¹⁸ atto a
10⁻¹⁵ femto f
10⁻¹² pico p
10⁻⁹ nano n
10⁻⁶ mikro μ Unicode number for μ is 181 and can be rendered in HTML with the HTML entity &micro or &#181.
10⁻³ milli m
10⁻² centi c
10⁻¹ deci d
10¹ deca da ten ten
10² hecto h hundred hundred
10³ kilo k thousand thousand
10⁶ mega M million million
10⁹ giga G billion milliard
10¹² tera T trillion billion The greek word teras or teratos means monster or marvel/wonder.
10¹⁵ peta P quadrillion billiard Added 1975
10¹⁸ exa E quintillion trillion Added 1975
10²¹ zetta Z sextillion trilliard Added 1991
10²⁴ yotta Y septillion quadrillion
10²⁷ ronna (xona?) R (X?) octillion quadrilliard Added 2022. The Earth weighs approximately six ronnagrams.
10³⁰ quetta (weka?) Q (W?) nonillion quintillion Added 2022. Jupiter weighs approximately two quettagrams.
10³³ vunda V decillion
10³⁶ uda U undecillion Sextillion
10³⁹ treda TD duodecillion
10⁴² sorta S tredecillion Septillion
10⁴⁵ rinta R quattuordecillion
10⁴⁸ quexa Q quindecillion Octillion
10⁵¹ pepta PP sexdecillion
10⁵⁴ ocha O septendecillion Nonillion
10⁵⁷ nena N octodecillion
10⁶⁰ minga MI novemdecillion Decillion
10⁶³ luma L vigintillion
10⁶⁶ hana HA Undecillion
10⁶⁹ ana A
10⁷² sopho SO Duodecillion
Update 2023-09-08: It seems that the units xona, weka, vunda, uda and on the other side xonto, wekto, vunkto, unto etc. are not standardized and widely known.
Binary prefixes
2¹⁰ kibi Ki
2²⁰ mebi Mi
2³⁰ gibi Gi
2⁴⁰ tebi Ti
2⁵⁰ pebi Pi
2⁶⁰ pebi Ei

Misc

10100 is a googol. 10googol is a googolplex.

See also

kibibytes, mebibytes and gibibytes
The Excel worksheet function convert is able to convert values between some SI and non-SI systems (for example miles to kilometers).
The PowerShell integer literal multipliers
Einheitenverordnung: Art. 19 - SI-Vorsätze
data

Links

Wikipedia: Long and short scale

Index