This calculator finds the kinetic energy of a moving object from its mass and speed. Enter the values and it returns the energy of motion in joules and other units.
What the symbols mean
- E — kinetic energy (joules).
- m — mass of the object (kilograms).
- v — speed of the object (metres per second).
Worked example
A 1,500 kg car at 20 m/s has a kinetic energy of ½ × 1500 × 20² = 300,000 J. Double the speed to 40 m/s and the energy quadruples to 1.2 MJ — because speed is squared.
Want the full story behind this formula? Read our guide: Kinetic Energy.