A petabyte is a unit of digital information multiple of the unit byte. It Is an SI unit and is one quadrillion bytes, or 1 billiard bytes, 1000 terabytes (decimal values). The binary value of one Petabyte is 1,125,899,906,842,624 bytes. You can convert Petabytes to other units here by enter amount of if into green input below. You can also check some basic conversions in Petabytes Conversion Table.