SI Prefixes

Example: 1 TW=1000 GW (W=Watt)

Symbol Prefix Factor
Z Zetta 1021
E Exa 1018
P peta 1015
T tera 1012
G giga 109
M Mega 106
k kilo 103
h hecto 102
da deca 101
d deci 10-1
c centi 10-2
m milli 10-3
µ micro 10-6
n nano 10-9
p pico 10-12
f femto 10-15
a atto 10-18
z zepto 10-21
y yokto 10-24
Note: In the computer world things are a bit different:
Symbol Prefix Factor Factor
P peta 250 1125899906842624
T tera 240 1099511627776
G giga 230 1073741824
M Mega 220 1048576
k kilo 210 1024