KF or Kf may refer to:

Businesses and brands

  • KF Aerospace, a Canadian aerospace company
  • KF Cargo, a Canadian cargo airline
  • KF Defence Programs, a Canadian defense contractor
  • Korea Foundation
  • Air Belgium, an airline based in Belgium (IATA code KF)
  • Blue1, a defunct airline based in Finland (IATA code KF)
  • Kelly's Fuels, fuels merchant in Northern Ireland
  • Kettle Foods, a snack foods manufacturer
  • Kooperativa Förbundet, a cooperative Swedish retail chain
  • KrisFlyer, the frequent flyer program of Singapore Airlines
  • Kiwi Farms

Games

  • Katamari Forever, a video game for the PlayStation 3
  • Killing Floor (2009 video game), a cooperative survival horror video game

Science and technology

  • A member of the Mazda K engine family
  • Kalman filter, in mathematics
  • Potassium fluoride, a chemical substance
  • Kleinflansch, a quick release vacuum flange
  • Cryoscopic constant, K<sub>f</sub>, related to freezing-point depression
  • Karl Fischer titration
  • Stability constants of complexes, abbreviated as K<sub>f</sub> (constant of formation)
  • Filtration coefficient
  • Kline–Fogleman airfoil
  • KDE Frameworks, a collection of libraries for Qt applications

Sports

  • Knattspyrnufélag Fjallabyggðar, an Icelandic sports team
  • KF, in kart racing, the designation of Original Kart from 2013–2016