The kilobyte per second is a the unit bit for data transfer rate. The prefix kilo- (symbol k) is defined in the International System of Units (SI) as a multiplier of 103 (1 thousand), and therefore, 1 kilobyte / s = 8 kilobits / s = 8000 bits / s.
exbibyte per seconds
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.