Prefix
Yotta
Zetta
Exa
Peta
Tera
Giga
Mega
Kilo
Hecto
Deka
---
deci
centi
milli
micro
nano
pico
femto
atto
zepo
yocto
|
Symbol
Y
Z
E
P
T
G
M
k
h
dk
---
d
c
m
u
n
p
f
a
z
y
|
Value
Septillion
Sextillion
Quintillion
Quadrillion
Trillion
Billion
Million
Thousand
Hundred
Tens
Ones
Tenth
Hundredth
Thousandth
Millionth
Billionth
Trillionth
Quadrillionth
Quintillionth
Sextillionth
Septillionth
|
Power of 10
10 ^ 24
10 ^ 21
10 ^ 18
10 ^ 15
10 ^ 12
10 ^ 9
10 ^ 6
10 ^ 3
10 ^ 2
10 ^ 1
---
10 ^ -1
10 ^ -2
10 ^ -3
10 ^ -6
10 ^ -9
10 ^ -12
10 ^ -15
10 ^ -18
10 ^ -21
10 ^ -24
|
Example: If you had a device holding a BILLION Bytes, the proper prefix
would be 'giga-' (GigaByte), abbreviated as 'GB', indicating a value of
10 X 10^9 (1,000,000,000).
Although... that's not correct for 'bytes'. Memory is always expressed in
'Powers of 2' -- a Kilobyte is not really 1,000 bytes but 1024 bytes. Really.
(1024 is 2 ^ 10th power)
So, a Megabyte is 1024 X 1024 or 1,048,576 bytes (2 ^ 20).
And, a Gigabyte is 1024 X 1024 X 1024 or 1,073,741,824 bytes (2 ^ 30),
NOT an even 1,000,000,000 bytes!
Not sure? Just look at the 'Properties' of your hard drive.
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