NUMBER PREFIX TABLE

© 2001 Walt Howe
(last updated 19 May 2001)

Prefixes used with numbers to designate their powers of 10 or in computer usage, similar equivalent powers of 2.

Prefix Symbol Power
of 10
Power
of 2
yocto y 10-24  
zepto z 10-21  
atto a 10-18  
femto f 10-15  
pico p 10-12  
nano n 10-9 2
micro m 10-6  
milli m 10-3 2
centi c 10-2  
deci d 10  
(none)   100 20
deka D 101  
hecto h 102  
kilo k or K 103 210
mega M 106 220
giga G 109 230
tera T 1012 240
peta P 1015 250
exa E 1018 260
zetta Z 1021 270
yotta Y 1024 280

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