unit
of measure
conversions
equivalences
|
|
|
|
italiano
 |
english
 |
|
|
|
multiples
and submultiples of the International System SI
factor
of
multiplication |
prefixe |
simbol |
value |
| 10
24 |
yotta
|
Y
|
1
000 000 000 000 000 000 000 000 |
| 10
21 |
zetta
|
Z
|
1
000 000 000 000 000 000 000 |
| 10
18 |
exa
|
E
|
1
000 000 000 000 000 000 |
| 10
15 |
peta
|
P
|
1
000 000 000 000 000 |
| 10
12 |
tera
|
T
|
1
000 000 000 000 |
| 10
9 |
giga
|
G
|
1
000 000 000 |
| 10
6 |
mega
|
M
|
1
000 000 |
| 10
3 |
chilo
|
k
|
1
000 |
| 10
2 |
hecto
|
h
|
100
|
| 10
1 |
deka
|
da
|
10
|
| 10
-1 |
deci
|
d
|
0.1 |
| 10
-2 |
centi
|
c
|
0.01 |
| 10
-3 |
milli
|
m
|
0.001 |
| 10
-6 |
micro
|
µ
|
0.000
001 |
| 10
-9 |
nano
|
n
|
0.000
000 001 |
| 10
-12 |
pico
|
p
|
0.000
000 000 001 |
| 10
-15 |
femto
|
f
|
0.000
000 000 000 001 |
| 10
-18 |
atto
|
a
|
0.000
000 000 000 000 001 |
| 10
-21 |
zepto
|
z
|
0.000
000 000 000 000 000 001 |
| 10
-24 |
yocto
|
y
|
0.000
000 000 000 000 000 000 001 |
In
outside of the U.S. the prefixed deka commonly
it is defined deca
In
occasion of the 11° Conférence Générale des Poids
et Mésures (CGPM) of 1960, has stayed adopted the
first series of fixed and symbols of the multiples and decimal
submultiples of the International System units.
The factor 10-15 and 10-18 have been
inserted in 1964 from the 12°CGPM.
The factor 1015 and 1018 in 1975 from
the 15°CGPM.
The factor 1021, 1024, and 10-24,
proposals in 1990 from the CIPM, for then being approved in
1991 from the 19°CGPM. |
  
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