• Calculations: order of magnitudes •
Prefixes - all powers
 
Fill in the appropriate line the known value
• small •          pico p:  10-12 = 0.000 000 000 001
10 pico: 
100 pico: 
1000 pico = nano n:  10-9 = 0.000 000 001
10 nano: 
100 nano: 
1000 nano = micro µ:  10-6 = 0.000 001
10 micro: 
100 micro: 
1000 micro =1 milli m:  10-3 = 0.001
10 milli = 1 centi c:  10-2 = 0.01
10 centi = 1 deci d:  10-1 = 0.1
• • • basic unit 1:  100 = 1 = reference
1 deka (deca) da:  101 = 10
10 deka = 1 hecto h:  102 = 100
10 hecto = 1 kilo k:  103 = 1,000
10 kilo: 
100 kilo: 
1000 kilo = mega M:  106 = 1,000,000
10 mega: 
100 mega: 
1000 Mega = giga G:  109 = 1,000,000,000
10 giga: 
100 giga: 
• large •           tera T:  1012 = 1,000,000,000,000

Prefixes for decimal multiples of units and parts of units

Factor in full in
words		 SI
prefix		 SI
symbol
1.0E+24
1.0E+21
1.0E+18
1.0E+15
1.0E+12
1.0E+9
1.0E+6
1.0E+3
1.0E+2
1.0E+1
1.0E 0
1.0E-1
1.0E-2
1.0E-3
1.0E-6
1.0E-9
1.0E-12
1.0E-15
1.0E-18
1.0E-21
1.0E-24		 large  1 000 000 000 000 000 000 000 000
         1 000 000 000 000 000 000 000
         1 000 000 000 000 000 000
         1 000 000 000 000 000
         1 000 000 000 000
         1 000 000 000
         1 000 000
         1 000
         100
         10
ref.    1
         0.1
         0.01
         0.001
         0.000 001
         0.000 000 001
         0.000 000 000 001
         0.000 000 000 000 001
         0.000 000 000 000 000 001
         0.000 000 000 000 000 000 001
small 0.000 000 000 000 000 000 000 001
septillion
sextillion
quintillion
quadrillion
trillion
billion
million
thousand
hundred
ten
initial value
tenth
hundredth
thousandth
millionth
billionth
trillionth
quadrillionth
quintillionth
sextillionth
septillionth
 yotta
zetta
exa
peta
tera
giga
mega
kilo
hecto
deka
one
deci
centi
milli
micro
nano
pico
femto
atto
zepto
yocto		 Y
Z
E
P
T
G
M
k
h
da
-
d
c
m
µ
n
p
f
a
z
y

Exponent (basis 10) of decimals: E n = 10n

Factor European name American name
103 thousand thousand
106 million million
109 milliard billion • •
1012 billion • • trillion • • •
1015 billiard quadrillion • • • •
1018 trillion • • • quintillion • • • • •
1021 trilliard sextillion
1024 quadrillion • • • • septillion
1027 quadrilliard octillion
1030 quintillion • • • • • nonillion
1033  - decillion
1036 sextillion undecillion
1039  - duodecillion
1042 septillion tredecillion
1045  - quattuordecillion
1048 octillion quindecillion
1051  - sextdecillion
1054 nonillion septendecillion
1057  - octodecillion
1060 decillion novemdecillion
1063  - nonillionvigintillion
 
Number Name
10100 googol
10too many googolplex

Though generally speaking, a googol is just a term that means "A very big number"
and a googolplex is just a term that means "An unimaginably large number.

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