The exabyte is a multiple of the unit byte for digital information. The prefix exa indicates multiplication by the sixth power of 1000 (1018) in the International System of Units (SI). Therefore one exabyte is one quintillion bytes (short scale). The symbol for the exabyte is EB. 1 EB = = = = 1000 petabytes = = . A related unit, the exbibyte, using a binary prefix, is , about 15% larger.