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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♠ 1048 576
≈ 1,049 × 106
mega
M
106
gibi
Gi
230
10243
7009107374182400000♠ 1073 741 824
≈ 1,074 × 109
giga
G
109
tebi
Ti
240
10244
7012109951162777600♠ 1099 511 627 776
≈ 1,100 × 1012
tera
T
1012
pebi
Pi
250
10245
7015112589990684260♠ 1125 899 906 842 624
≈ 1,126 × 1015
peta
P
1015
exbi
Ei
260
10246
7018115292150460680♠ 1152 921 504 606 846 976
≈ 1,153 × 1018
exa
E
1018
zebi
Zi
270
10247
7021118059162071740♠ 1180 591 620 717 411 303 424
≈ 1,181 × 1021
zetta
Z
1021
yobi
Yi
280
10248
7024120892581961460♠ 1208 925 819 614 629 174 706 176
≈ 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%)