# Bit Rate

In telecommunications and computing, bit rate (sometimes written bitrate or as a variable R) is the number of bits that are conveyed or processed per unit of time.

The bit rate is quantified using the bits per second (bit/s) unit, often in conjunction with an SI prefix such as kilo- (kbit/s), mega- (Mbit/s), giga- (Gbit/s) or tera- (Tbit/s). Note that, although the IEC 60027-2 standard defines a convention for computer data symbols in base two exponents for binary multiples, when describing a bit rate, the SI convention of base ten exponents for decimal multiples is traditionally used. A bit rate of 1 kbit/s is equivalent to 1,000 (103) bits per second, not 1,024 (210) bits per second. Uppercase K as in Kbit/s should also never be used.

The formal abbreviation for "bits per second" is "bit/s" (not "bits/s", see writing style for SI units). In less formal contexts the abbreviations "b/s" or "bps" are sometimes used, though this risks confusion with "bytes per second" ("B/s", "Bps"), and the use of the abbreviation ps is also inconsistent with the SI symbol for picosecond.

1 Byte/s (B/s) corresponds to 8 bit/s (bit/s).

### Other articles related to "bit rate, rate, bit, bits, bit rates":

Audio Bit Depth - Bit Rate - Calculating Values
... An audio file's bit rate can be calculated given sufficient information ... Bit rate = (sampling rate) × (bit depth) × (number of channels) E.g ... for a recording with a 44.1 kHz sampling rate, a 16 bit depth, and 2 channels (stereo) 44100 × 16 × 2 = 1411200 bits per second = 1411.2 kbit/s The eventual file size of ...
Bandwidth (computing) - Network Bandwidth Capacity
... Bandwidth sometimes defines the net bit rate (aka ... peak bit rate, information rate or physical layer useful bit rate), channel capacity, or the maximum throughput of a logical or physical communication path in a digital communication system ... reason for this usage is that according to Hartley's law, the maximum data rate of a physical communication link is proportional to its bandwidth in hertz, which is sometimes called frequency bandwidth ...
Bit Rate - Multimedia - Notes
... protocols, overheads, encoding schemes, etc.) the actual bit rates used by some of the compared-to devices may be significantly higher than what is listed above ...
Symbol Rate - Modulation - Data Rate Versus Error Rate
... The bandwidth depends on the symbol (modulation) rate (not directly on the bit rate) ... As the bit rate is the product of the symbol rate and the number of bits encoded in each symbol, it is clearly advantageous to increase the latter if the former is fixed ... However, for each additional bit encoded in a symbol, the constellation of symbols (the number of states of the carrier) doubles in size ...
Comparison Of Wireless Data Standards - Peak Bit Rate and Throughput
... When discussing throughput, there is often a distinction between the peak data rate of the physical layer, the theoretical maximum data throughput and typical throughput ... The peak bit rate of the standard is the net bit rate provided by the physical layer in the fastest transmission mode (using the fastest modulation scheme and error code), excluding forward error ... The theoretical maximum throughput for end user is clearly lower than the peak data rate due to higher layer overheads ...

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