Constant or The Constant may refer to:

Mathematics

* Constant (mathematics), a non-varying value * Mathematical constant, a special number that arises naturally in mathematics, such as or

Other concepts

* Control variable or scientific constant, in experimentation the unchanging or constant variable * Physical constant, a physical quantity generally believed to be universal and unchanging * Constant (computer programming), a value that, unlike a variable, cannot be reassociated with a different value * Logical constant, a symbol in symbolic logic that has the same meaning in all models, such as the symbol "=" for "equals"

People

* Constant (given name) * Constant (surname) * John, Elector of Saxony (1468–1532), known as John the Constant * Constant Nieuwenhuys (1920-2005), better known as Constant

Places

* Constant, Barbados, a populated place

Arts and entertainment

* " The Constant", a 2008 episode of the television show ''Lost'' * ''The Constant'' (Story of the Year album) * ''The Constant'' (I Blame Coco album) * Constants (band), an American rock band * "Constant pt.1 pt.2", song by Black Eyed Peas from '' Masters of the Sun Vol. 1'' {{disambiguation