45 may refer to: 45 (number), the natural number following 44 and preceding 46 one of the years 45 BC, AD 45, 1945, 2045
Arts and entertainment Film 45 (2009 film), a short psychological thriller 45 (2025 film), a Kannada-language action fantasy film .45 (film), a 2006 American independent thriller film
Music 45 rpm record or 45, a common form of vinyl single 45 (Jaguares album), 2008 45 (Kino album), 1982 "45" (Elvis Costello song), 2002 "45" (The Gaslight Anthem song), 2012 "45" (Shinedown song), 2003 "45", a song by Bon Iver from the 2016 album 22, A Million "Forty Five", a song by Karma to Burn from the 2010 album Appalachian Incantation
Other uses in arts and entertainment 45 (book), by Bill Drummond, 2000 Forty-five, a Doctor Who anthology audio drama
Other uses .45, the diameter in inches of several 11 mm caliber firearm cartridges Colt .45 caliber, the M1911 pistol .45 calibre Colt Single Action Army revolver Donald Trump, the 45th and 47th president of the United States Jacobite rising of 1745, or "The '45", in Scotland and England Forty-fives, a card game Fortyfive, a software development company Rover 45, a small family car (1999–2005)
See also 45th (disambiguation)