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Kinetic Energy Calculator

Kinetic energy (½mv²) of a moving object, with the velocity needed for a target energy.

Enter values

Results update as you type.

Result

Kinetic energy

300,000 J

Kilojoules
300
At double the speed
1,200,000 J
Energy rises with the square of speed
Momentum
30,000 kg·m/s

About the Kinetic Energy Calculator

Kinetic energy (½mv²) of a moving object, with the velocity needed for a target energy.

Also known as: ke calculator, kinetic energy formula, energy of motion, 1/2 mv2.

How to use this calculator

  1. Enter mass, velocity.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

KE = ½ m v²

Worked example

Using the values pre-filled in the calculator above:

  • Mass = 1,500 kg
  • Velocity = 20 m/s

the calculator returns:

  • Kinetic energy: 300,000 J
  • Kilojoules: 300
  • At double the speed: 1,200,000 J
  • Momentum: 30,000 kg·m/s