Petabit

The petabit is a multiple of the unit bit for digital information or computer storage. The prefix peta (symbol P) is defined in the International System of Units (SI) as a multiplier of 10¹⁵ (1 quadrillion, short scale),[1] and therefore

1 petabit = 10¹⁵bits = 1000000000000000bits = 1000 terabits.

Multiples of bits
Decimal Value SI 1000 10^3 kbit kilobit 1000^2 10^6 Mbit megabit 1000^3 10^9 Gbit gigabit 1000^4 10^12 Tbit terabit 1000^5 10^15 Pbit petabit 1000^6 10^18 Ebit exabit 1000^7 10^21 Zbit zettabit 1000^8 10^24 Ybit yottabit	Binary Value IEC JEDEC 1024 2^10 Kibit kibibit Kbit kilobit 1024^2 2^20 Mibit mebibit Mbit megabit 1024^3 2^30 Gibit gibibit Gbit gigabit 1024^4 2^40 Tibit tebibit - 1024^5 2^50 Pibit pebibit - 1024^6 2^60 Eibit exbibit - 1024^7 2^70 Zibit zebibit - 1024^8 2^80 Yibit yobibit -
See also Nibble Byte Orders of magnitude of data

The petabit has the unit symbol Pbit or Pb.

The petabit is closely related to the pebibit, a unit multiple derived from the binary prefix pebi of the same order of magnitude,[2] which is equal to 2⁵⁰bits = 1125899906842624bits, or approximately 13% larger than the petabit.

See also

• SI prefix
• petabyte

References

1. The NIST Reference on Constants, Units, and Uncertainty: SI prefixes
2. The NIST Reference on Constants, Units, and Uncertainty: Prefixes for binary multiples