Bandwidth has several related meanings:
- Bandwidth (signal processing) or analog bandwidth, frequency bandwidth or radio bandwidth: a measure of the width of a range of frequencies, measured in hertz
- Bandwidth (computing), the rate of data transfer, bit rate or throughput, measured in bits per second (bps)
- Spectral linewidth: the width of an atomic or molecular spectral line, measured in hertz
Bandwidth can also refer to:
- Bandwidth (linear algebra), the width of the non-zero terms around the diagonal of a matrix
- In kernel density estimation, "bandwidth" describes the width of the convolution kernel used
- A normative expected range of linguistic behavior in language expectancy theory
- In business jargon, the resources needed to complete a task or project
- Bandwidth (radio program): A Canadian radio program
- Graph bandwidth, in graph theory