Calm or CALM may refer to:

• Cal-Maine (NASDAQ: CALM), an American egg producer
• Campaign Against Living Miserably, a UK charity
• Department of Conservation and Land Management (Western Australia)
• California Living Museum, a zoo in Bakersfield, California

• Calmodulin (CaM), calcium-modulated protein
  • CALM2
  • CALM3
• Clathrin-assembly lymphoid myeloid leukaemia protein, see Ap180
• Communications, Air-interface, Long and Medium range, a standardized set of protocols and parameters for high speed communication
  • CALM M5
  • Catenary anchor leg mooring, a type of single bouy mooring for ships

• Commercial Advertisement Loudness Mitigation Act, U.S. legislation prohibiting TV commercials from being louder than the program on which they are shown
• Conservation and Land Management Act 1984, or CALM Act, Western Australian legislation that created the Department of Conservation and Land Management

• "The Calm" (Arrow), an episode of Arrow
• The Calm (film), a 1980 film
• Calm, a fictional city in the Kiba (TV series) anime world

• Calm (music group), an American hip hop group
• Calm (album), a 2020 album by 5 Seconds of Summer
• The Calm (Insane Clown Posse EP)
• The Calm (Kaskade album)
• The Calm (Hostyle Gospel album)
• "The Calm (Interlude)", a song from the album Aquarius (Tinashe album) by Tinashe
• A piece of music from the album Neo Cali by Vektroid

• Jonathan Calm (born 1971), American visual artist
• Marie Calm (1832–1887), German author and feminist

• Calm (company), a software company in San Francisco, California
• Calm, Missouri, a community in the United States
• Intertropical Convergence Zone, also known as The Calms

• Calmness
• All pages with titles containing CALM