Flux is a rate of flow through a surface or substance in physics, and has a related meaning in applied mathematics.

Flux may also refer to:

Science and technology Biology and healthcare Flux (biology), movement of a substance between compartments Flux (metabolism), the rate of turnover of molecules through a metabolic pathway 4-Fluoroamphetamine (4-FA; PAL-303; "Flux"), a central nervous system stimulant with quasi-amphetamine effects Dysentery, or other diseases called "flux", which cause the loss of fluid by diarrhea or hemorrhage Rheumatism (historically), or "flux", thought to be caused by an excessive flow of rheum or fluid into a joint Slime flux, a bacterial disease that occurs on certain trees

Computing Flux (machine-learning framework) Flux (graphics software), a suite of VRML/X3D viewing/authoring software Flux (software company), a developer of workflow software Flux (text-to-image model), a suite of text-to-image model developed by Black Forest Labs f.lux, a program that adjusts the color temperature of a computer display Fast flux, a DNS technique used by botnets to hide phishing and malware delivery sites

Physics and engineering Materials Flux (metallurgy), a chemical reducing agent, flowing agent, or purifying agent enhancing success in soldering and like joining of metals Ceramic flux, a substance which lowers the melting point and promotes glass formation in ceramic materials and glasses Secondary flux, a substance which acts as a ceramic flux in combination with other materials or at higher temperatures Something integrated over a surface Electric flux, the electric field through a surface integrated over the surface's area Luminous flux, luminous intensity integrated over solid angle. Used in photometry Magnetic flux, magnetic field through a surface integrated over the surface's area Radiant flux, the total power emitted by a source. Used in radiometry Something per unit area Intensity (physics), power per unit area (sometimes also called flux)

People with the name Alfred William Flux (1867–1942), British economist and statistician Robert Flux, guitarist of the band Oomph! Maarten van der Vleuten (born 1967), Dutch composer and producer, alias Flux

Art and entertainment Fictional characters Flux (comics), a Marvel Comics antagonist opposing the Hulk Flux (Dennis Sykes), a character in the Marvel Comics series 1 Month 2 Live Flux Wildly, a character in the computer game Toonstruck

Literature Flux (novel), a book by Stephen Baxter "Flux", a short story by Michael Moorcock

Music Flux (Alison Goldfrapp album), 2025 Flux (Caveman Shoestore album), 1994 Flux (Poppy album), or the title song, 2021 Flux (Rich Robinson album), 2016 Flux, an album by Love Spirals Downwards, 1998 "Flux" (Bloc Party song), 2007 "Flux" (Ellie Goulding song), 2019 "Flux", a song by Lamb of God from New American Gospel, 2000

Other uses in art and entertainment Flux (magazine), a music, comic book and video game magazine of the 1990s MTV Flux, a former television channel in the United Kingdom and Japan Doctor Who: Flux, the thirteenth series of the British science fiction television programme Bit.Trip Flux, the 6th and final main game in the Bit.Trip video game series

Other uses Flux (political party), a political party in Australia Flux, Utah, a ghost town and former mining community in Tooele County, Utah "Flux", the imagery of the River in the fragments of the presocratic philosopher Heraclitus

See also Æon Flux, an animated television show Fluxus, an art movement Fluxx, a card game Influx (disambiguation)