eiB

EiB stands for exbibyte, a unit of information used in computing to quantify very large data sizes. It represents 2^60 bytes, equal to 1,152,921,504,606,846,976 bytes. The prefix exbi- and the symbol EiB are part of the binary prefix system designed to distinguish powers of two from the decimal prefixes used with bytes (for example, the exabyte, EB, denotes 10^18 bytes).

In the binary system, 1 EiB is also equal to 1,024 PiB, or 1,048,576 TiB, or 1,073,741,824 GiB. These relationships follow the progression of binary prefixes: KiB, MiB, GiB, TiB, PiB, EiB, and so on. The decimal counterpart, exabyte, uses the prefix exa- and is 10^18 bytes, which means 1 EiB is about 1.1529 EB.

EiB is standardized within the IEC/ISO binary-prefix framework to provide unambiguous terminology for powers of two in computing. It is most commonly encountered in discussions of very large-scale storage capacities, such as data centers, cloud storage infrastructure, or theoretical memory budgets. In everyday consumer contexts, capacities are more often described in decimal units (GB, TB), leading to occasional confusion between binary and decimal measurements. Nevertheless, EiB and other binary prefixes are widely used in technical documentation and system specifications to convey precise scales of data.