Petabyte

The petabyte is a multiple of the unit byte for digital information. The prefix peta indicates the fifth power of 1000 and means 10¹⁵ in the International System of Units (SI), and therefore 1 petabyte is one quadrillion (short scale) bytes, or 1 billiard (long scale) bytes. The unit symbol for the petabyte is PB.

1 PB = 1000000000000000B = 10¹⁵bytes = 1000terabytes.

A related unit, the pebibyte (PiB), using a binary prefix, is equal to 1024⁵ bytes, which is more than 12% greater (2⁵⁰bytes = 1125899906842624bytes).

Examples of the use of the petabyte to describe data sizes in different fields are:

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