Prefixes for Basic Metric Units (table)

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Prefixes for Basic Metric Units
Prefix	Abbreviation	Power of 10	Equivalent
Multiples
deka- or deca-	da	10¹	ten
hecto-	h	10²	hundred
kilo-	k	10³	thousand
mega-	M	10⁶	million
giga-	G	10⁹	billion
tera-	T	10¹²	trillion
peta-	P	10¹⁵	quadrillion
exa-	E	10¹⁸	quintillion
zetta-	Z	10²¹	sextillion
yotta-	Y	10²⁴	septillion
Fractions
Prefix	Abbreviation	Power of 10	Equivalent
deci-	d	10^-1	tenth
centi-	c	10^-2	hundredth
milli-	m	10^-3	thousandth
micro-	μ	10^-6	millionth
nano-	n	10^-9	billionth
pico-	p	10^-12	trillionth
femto-	f	10^-15	quadrillionth
atto-	a	10^-18	quintillionth
zepto-	z	10^-21	sextillionth
yocto-	y	10^-24	septillionth

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