In information theory, a **bit per second** (b/s) is a unit used to express the number of bits passing a designated point per second. See also telecommunication.

*Note 1:* For example, for two-condition serial transmission in a single channel in which each significant condition represents a bit, *i.e.,* a 0 or a 1, the bit rate in bits per second and the baud have the same numerical value only if each bit occurs in a unit interval. In this case, the data signaling rate in bits per second is 1/T, where T is the unit interval.

*Note 2:* The abbreviation *"bps"* is not in accordance with international standards, and is therefore deprecated.

*Note 3:* kB/s (with capitalized B) means "kilobyte per second."

A **megabit per second** is equal to 1,048,576 (2^{20}) bits per second.

Source: from Federal Standard 1037C and from MIL-STD-188