Bandwidth commonly refers to:

• Bandwidth (signal processing) or analog bandwidth, frequency bandwidth, or radio bandwidth, a measure of the width of a frequency range
• Bandwidth (computing), the rate of data transfer, bit rate or throughput
• Spectral linewidth, the width of an atomic or molecular spectral line

Bandwidth may also refer to:

• Bandwidth (linear algebra), the width of the non-zero terms around the diagonal of a matrix
• Kernel density estimation, the width of the convolution kernel used in statistics
• Graph bandwidth, in graph theory
• Coherence bandwidth, a frequency range over which a channel can be considered "flat"
• Power bandwidth, a frequency range for which power output of an amplifier exceeds a given fraction of full rated power

• Bandwidth (company), an American communications provider
• Bandwidth (radio program), a Canadian radio program
• Bandwidth, a normative expected range of linguistic behavior in language expectancy theory
• Bandwidth, the resources needed to complete a task or project in business jargon; see List of buzzwords

• Bit rate, in telecommunications and computing