IEC og ISO hava ásett hesi bineru prefiksini at nýta til stór tøl. Tey eru ásett í standardunum IEC 60027-2 A.2 og ISO/IEC 80000 og eru avleidd frá teimum tilsvarandi desimalu SI-prefiksunum.
IEC-prefiks |
Tal |
|
Uppruni (SI-prefiks)
|
Heiti |
Symbol |
2m |
1024n |
Desimaltal |
≈ a × 10b |
Heiti |
Symbol |
10b
|
kibi |
Ki |
210 |
10241 |
1024 |
= 1,024 × 103 |
kilo |
k |
103
|
mebi |
Mi |
220 |
10242 |
7006104857600000000♠1048576 |
≈ 1,049 × 106 |
mega |
M |
106
|
gibi |
Gi |
230 |
10243 |
7009107374182400000♠1073741824 |
≈ 1,074 × 109 |
giga
|
G |
109
|
tebi |
Ti |
240 |
10244 |
7012109951162777600♠1099511627776 |
≈ 1,100 × 1012 |
tera |
T |
1012
|
pebi |
Pi |
250 |
10245 |
7015112589990684260♠1125899906842624 |
≈ 1,126 × 1015 |
peta |
P |
1015
|
exbi |
Ei |
260 |
10246 |
7018115292150460680♠1152921504606846976 |
≈ 1,153 × 1018 |
exa |
E |
1018
|
zebi |
Zi |
270 |
10247 |
7021118059162071740♠1180591620717411303424 |
≈ 1,181 × 1021 |
zetta |
Z |
1021
|
yobi |
Yi |
280 |
10248 |
7024120892581961460♠1208925819614629174706176 |
≈ 1,209 × 1024 |
yotta |
Y |
1024
|
Prefiks
|
Binert prefiks býtt við desimalum prefiksi
|
Desimalt prefiks býtt við binerum prefiksi
|
kibi - kilo
|
1,024 (+2,4%) |
|
0,9766 (−2,3%) |
|
mebi - mega
|
1,049 (+4,9%) |
|
0,9537 (−4,6%) |
|
gibi - giga
|
1,074 (+7,4%) |
|
0,9313 (−6,9%) |
|
tebi - tera
|
1,100 (+10,0%) |
|
0,9095 (−9,1%) |
|
pebi - peta
|
1,126 (+12,6%) |
|
0,8882 (−11,2%) |
|
exbi - exa
|
1,153 (+15,3%) |
|
0,8674 (−13,3%) |
|
zebi - zetta
|
1,181 (+18,1%) |
|
0,8470 (−15,3%) |
|
yobi - yotta
|
1,209 (+20,9%) |
|
0,8272 (−17,3%) |
|