Duration

Duration may refer to:


 * The amount of time elapsed between two events
 * Duration (finance) – the weighted average time until the various cash flows from a security, such as a bond, are received
 * Duration (music) – an amount of time or a particular time interval, often cited as one of the fundamental aspects of music
 * Duration (philosophy) – a theory of time and consciousness first proposed by Henri Bergson
 * Duration (project management) – the number of calendar periods for the completion of a project in project management