Exbibyte (EiB)

Exactly 2⁶⁰ bytes (about 1.153 exabytes).

1 exbibyte = 1.152921505×10¹⁸ bytes (approximately).

About the exbibyte

Exbi joins the first two letters of exa to bi, for binary, and was published by the IEC in January 1999 with pebi. An exbibyte (EiB) is exactly 2^60 bytes, which is 1,152,921,504,606,846,976 bytes, or 1,024 pebibytes. NIST's page on binary prefixes lists it as the largest of the six original binary multiples.

The decimal exabyte is 10^18 bytes, so the exbibyte is about 15.3 percent larger. A useful landmark is the address space of a 64-bit machine, which can in principle reach 2^64 distinct byte addresses, or 16 exbibytes, a figure that has no neat decimal equivalent.

Real systems seldom approach this size, so the unit appears mostly in discussions of addressing and capacity limits. Like the other IEC names, it states plainly that the count is binary.

Sources: NIST: Prefixes for binary multiples; Wikipedia: Binary prefix; Wikipedia: Byte

Exbibyte conversion chart

1 exbibyte expressed in every other digital storage unit:

Unit	1 exbibyte
Bytes	1.152921505×10¹⁸
Kilobytes	1.152921505×10¹⁵
Megabytes	1,152,921,504,607
Gigabytes	1,152,921,505
Terabytes	1,152,921.505
Bits	9.223372037×10¹⁸
Petabytes	1,152.921505
Kibibytes	1.125899907×10¹⁵
Mebibytes	1,099,511,627,776
Gibibytes	1,073,741,824
Tebibytes	1,048,576
Kilobits	9.223372037×10¹⁵
Megabits	9,223,372,036,855
Gigabits	9,223,372,037
Exabytes	1.152921505
Zettabytes	0.001152921505
Yottabytes	0.000001152921505
Pebibytes	1,024
Terabits	9,223,372.037
Kibibits	9.007199255×10¹⁵
Mebibits	8,796,093,022,208
Gibibits	8,589,934,592
Nibbles	2.305843009×10¹⁸

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