The exbibyte per second is a multiple of the unit bit for Data Transfer Rate. The prefix exbi (symbol Ei) is defined in the International System of Units (SI) as a multiplier of 2⁶⁰ (1 exbi, short scale), and therefore 1 exbibyte per second = 2⁶⁰ bytes per second = 1152921504606846976 bytes per second. The exbibyte per second has the unit symbol EiB/s.