PIB

PiB is the pebibyte, a unit of digital information storage defined by the IEC as 2^50 bytes. It is part of the binary prefix series used to express powers of two: KiB (2^10), MiB (2^20), GiB (2^30), TiB (2^40), PiB (2^50), EiB (2^60). Accordingly, 1 PiB equals 1,125,899,906,842,624 bytes.

In larger or smaller units, 1 PiB equals 1024 TiB, 1,048,576 GiB, 1,073,741,824 MiB, and 1,099,511,627,776 KiB. In decimal terms, a pebibyte is approximately 1.126 petabytes (PB).

PiB is used in contexts where binary multiples are standard, such as computer memory and some storage systems. It is common in high-performance computing, data centers, and large-scale cloud storage to reference capacities on the order of multiple PiB. This contrasts with the petabyte (PB), which is defined in decimal terms as 10^15 bytes. Because of the difference between binary and decimal prefixes, the same labeled quantity can represent different numbers of bytes depending on the convention used.

Originating from the IEC binary prefix set introduced to reduce confusion with decimal prefixes, PiB and its related units are most often encountered in technical and enterprise environments rather than consumer labeling. Some software and vendors still blur the distinction, which can lead to ambiguity between PiB and PB in everyday use.