在电信行业，比特率或数据传输速率指在一个数据传送系统中，单位时间内通过设备比特、字符、块等的平均量。通常使用比特每秒或字节每秒两单位的复合形式度量。

In telecommunications, data transfer rate is the average number of bits (bitrate), characters or symbols (baudrate), or blocks per unit time passing between equipment in a data transmission system. Most commonly, measurements of data transfer rate are reported in multiples of unit bits per second (bit/s) or occasionally in bytes per second (B/s). The data rates of modern residential high-speed Internet connections are most commonly expressed in multiples of bits per second, such as megabits per second (Mbit/s) or kilobits per second (kbit/s).