Pebibytes to Gigabytes (PiB to GB)

1 pebibyte equals 1,125,899.907 gigabytes (rounded).

1 pebibyte = 1,125,899.907 gigabytes

How to convert pebibytes to gigabytes

To convert pebibytes to gigabytes, multiply the number of pebibytes by 1,125,899.907. The factor is rounded to 10 significant digits. To go the other way, multiply gigabytes by 8.881784197×10⁻⁷ (rounded).

gigabytes = pebibytes × 1,125,899.907

Example: 10 pebibytes = 11,258,999.07 gigabytes.

Decimal prefixes (kB, MB, GB) are powers of 1,000; binary prefixes (KiB, MiB, GiB) are powers of 1,024. Storage makers use decimal; Windows reports binary but labels it GB.

About these units

Pebibyte (PiB)

ComputingCurrent unit

Exactly 2⁵⁰ bytes (about 1.126 petabytes).

Pebi was one of the two prefixes, with exbi, that the IEC added in January 1999 as Amendment 2 to IEC 60027-2, extending the set it approved in December 1998. The name keeps the first two letters of peta and appends bi for binary, and the symbol is PiB. It is a binary unit of exactly 2^50 bytes, or 1,125,899,906,842,624 bytes.

That is 1,024 tebibytes. Set against the decimal petabyte of 10^15 bytes, a pebibyte is about 12.6 percent larger, a gap that has grown with each prefix step from 2.4 percent at kilo. As a result, anyone who divides a 1 PB figure from a storage vendor by 2^50 will see about 0.89 PiB.

The pebibyte is useful where capacity is counted in powers of two and the exact size must be unambiguous. Wikipedia illustrates the petabyte scale as about 2,000 years of music in MP3 form.

1 pebibyte = 1.125899907×10¹⁵ bytes (approximately).

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

Gigabyte (GB)

ComputingCurrent unit

1,000,000,000 bytes (decimal). Storage manufacturers and phone makers use this definition.

The gigabyte is where the decimal-versus-binary dispute turned into lawsuits. Drive makers advertise capacity in decimal units, so a 500 GB drive holds 500 billion bytes, but Windows reports sizes in binary units and shows about 465.7 of what it labels GB for the same drive. Early challenges against Western Digital and Seagate were settled, with Western Digital adding disclaimers that usable capacity may differ from the advertised figure.

A 2019 lawsuit was decided in the manufacturers' favor, with the court relying on the decimal definition. For scale, one gigabyte holds roughly an hour of standard-definition video at 2.2 Mbit/s. A single-layer DVD+R holds about 4.7 GB and a single-layer Blu-ray about 25 GB. RAM is still often sized in binary gigabytes, which the IEC would call gibibytes.

1 gigabyte = 1,000,000,000 bytes (exactly).

Sources: Wikipedia: Gigabyte; Wikipedia: Binary prefix; Wikipedia: Gibibyte

Related conversions

See all digital storage units.