KN or kn may refer to:



Science, technology, and mathematics:

  • .kn, the country code top level domain (ccTLD) for Saint Kitts and Nevis
  • Complete graph of size , denoted
  • Kilonewton (kN), an SI unit of force
  • Klein–Nishina formula, a formula for prediction of the angular distribution of x-rays and gamma rays incident upon a single electron
  • Knot (unit) (kn), nautical miles per hour
  • Knudsen number (Kn), in physics

Other uses: