Kinetic Energy Calculator

Your details

Pick the unknown, then enter the other two values. KE = ½mv² is rearranged for you.
The mass of the moving object.
Speed magnitude. Direction does not change kinetic energy.
Kinetic energy
9J
Linear momentum (p = m·v)6kg·m/s
Energy in kilojoules0.009kJ
Energy in calories2.15cal
Energy in watt-hours0.0025Wh
Energy in foot-pounds6.638ft·lb

The kinetic energy is 9 joules.

  • Kinetic energy is the energy of motion: KE = ½·m·v².
  • It scales with the SQUARE of speed: double the speed and you quadruple the energy.
  • That is 2.15 cal or 6.64 foot-pounds, with 6 kg·m/s of momentum.

Next stepCompare with gravitational potential energy (mgh) to track energy as it converts between forms.

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