വിക്കിപീഡിയ, ഒരു സ്വതന്ത്ര വിജ്ഞാനകോശം.
(ഫലകം:SI prefixes എന്ന താളിൽ നിന്നും തിരിച്ചുവിട്ടതു പ്രകാരം)
|
Prefix
|
1000m
|
10n
|
Decimal
|
English word
|
Since[nb 1]
|
Name
|
Symbol
|
Short scale
|
Long scale
|
yotta
|
Y
|
10008
|
1024
|
1000000000000000000000000
|
septillion
|
quadrillion
|
1991
|
zetta
|
Z
|
10007
|
1021
|
1000000000000000000000
|
sextillion
|
thousand trillion
|
1991
|
exa
|
E
|
10006
|
1018
|
1000000000000000000
|
quintillion
|
trillion
|
1975
|
peta
|
P
|
10005
|
1015
|
1000000000000000
|
quadrillion
|
thousand billion
|
1975
|
tera
|
T
|
10004
|
1012
|
1000000000000
|
trillion
|
billion
|
1960
|
giga
|
G
|
10003
|
109
|
1000000000
|
billion
|
thousand million
|
1960
|
mega
|
M
|
10002
|
106
|
1000000
|
million
|
1960 (1873)
|
kilo
|
k
|
10001
|
103
|
1000
|
thousand
|
1960 (1795)
|
hecto
|
h
|
10002/3
|
102
|
100
|
hundred
|
1960 (1795)
|
deca
|
da
|
10001/3
|
101
|
10
|
ten
|
1960 (1795)
|
|
10000
|
100
|
1
|
one
|
–
|
deci
|
d
|
1000−1/3
|
10−1
|
0.1
|
tenth
|
1960 (1795)
|
centi
|
c
|
1000−2/3
|
10−2
|
0.01
|
hundredth
|
1960 (1795)
|
milli
|
m
|
1000−1
|
10−3
|
0.001
|
thousandth
|
1960 (1795)
|
micro
|
μ
|
1000−2
|
10−6
|
0.000001
|
millionth
|
1960 (1873)
|
nano
|
n
|
1000−3
|
10−9
|
0.000000001
|
billionth
|
thousand millionth
|
1960
|
pico
|
p
|
1000−4
|
10−12
|
0.000000000001
|
trillionth
|
billionth
|
1960
|
femto
|
f
|
1000−5
|
10−15
|
0.000000000000001
|
quadrillionth
|
thousand billionth
|
1964
|
atto
|
a
|
1000−6
|
10−18
|
0.000000000000000001
|
quintillionth
|
trillionth
|
1964
|
zepto
|
z
|
1000−7
|
10−21
|
0.000000000000000000001
|
sextillionth
|
thousand trillionth
|
1991
|
yocto
|
y
|
1000−8
|
10−24
|
0.000000000000000000000001
|
septillionth
|
quadrillionth
|
1991
|
|
|
- ↑ The metric system was introduced in 1795 with several metric prefixes, of which, however, only six were adopted as SI prefixes by the 11th CGPM conference in 1960, whereas myria (ma, 104) and myrio (mo, 10-4) as well as double and demi were not adopted. In 1873, micro and mega were recommended by the British Association for the Advancement of Science. The other dates relate to recognition by a resolution of the CGPM.