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. 10^googol is a googolplex.

Prefixes for Data Units

Misc

See also

Links

			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

2¹⁰	kibi	Ki
2²⁰	mebi	Mi
2³⁰	gibi	Gi
2⁴⁰	tebi	Ti
2⁵⁰	pebi	Pi
2⁶⁰	pebi	Ei