


SI Prefixes
Example: 1 TW=1000 GW (W=Watt)
| Symbol |
Prefix |
Factor |
| Z |
Zetta |
1021 |
| E |
Exa |
1018 |
| P |
peta |
1015 |
| T |
tera |
1012 |
| G |
giga |
109 |
| M |
Mega |
106 |
| k |
kilo |
103 |
| h |
hecto |
102 |
| da |
deca |
101 |
| d |
deci |
10-1 |
| c |
centi |
10-2 |
| m |
milli |
10-3 |
| µ |
micro |
10-6 |
| n |
nano |
10-9 |
| p |
pico |
10-12 |
| f |
femto |
10-15 |
| a |
atto |
10-18 |
| z |
zepto |
10-21 |
| y |
yokto |
10-24 |
Note: In the computer world things are a bit different:
| Symbol |
Prefix |
Factor |
Factor |
| P |
peta |
250 |
1125899906842624 |
| T |
tera |
240 |
1099511627776 |
| G |
giga |
230 |
1073741824 |
| M |
Mega |
220 |
1048576 |
| k |
kilo |
210 |
1024 |
Contributor: Joakim Ögren, Haudy Kazemi, Knut
Kristan Weber
Source: Farnell Components Catalogue
Please send any comments to Joakim Ögren.