SI prefixes

SI prefix SI symbol 1000m 10n Decimal value Short scale name Long scale name  
yocto  y  1000-8  10-24 0.000000000000000000000001 Septillionth Quadrillionth
zepto  z  1000-7  10-21 0.000000000000000000001 Sextillionth Trilliardth
atto  a  1000-6  10-18 0.000000000000000001 Quintillionth Trillionth
femto  f  1000-5  10-15 0.000000000000001 Quadrillionth Billiardth
pico  p  1000-4  10-12 0.000000000001 Trillionth Billionth
nano  n  1000-3  10-9 0.000000001 Billionth Milliardth
micro  µ  1000-2  10-6 0.000001 Millionth Millionth
milli  m  1000-1  10-3 0.001 Thousandth Thousandth
centi  c  1000-2/3  10-2 0.01 Hundredth Hundredth
deci  d  1000-1/3  10-1 0.1 Tenth Tenth
    10000  100 1 One One
deca  da  10001/3  101 10 Ten Ten
hecto  h  10002/3  102 100 Hundred Hundred
kilo  k  10001  103 1000 Thousand Thousand
mega  M  10002  106 1000000 Million Million
giga  G  10003  109 1000000000 Billion Milliard
tera  T  10004  1012 1000000000000 Trillion Billion
peta  P  10005  1015 1000000000000000 Quadrillion Billiard
exa  E  10006  1018 1000000000000000000 Quintillion Trillion
zetta  Z  10007  1021 1000000000000000000000 Sextillion Trilliard
yotta  Y  10008  1024 1000000000000000000000000 Septillion Quadrillion