Kinetic Energy Calculator
Find the kinetic energy of any moving object from its mass and speed.
kg
m/s
0.1 kJ
0.0239 kcal
Formula
Examples
| Input | Result |
|---|---|
| m = 2 kg, v = 10 m/s | KE = 100 J |
About this calculator
Kinetic energy is the energy an object possesses because of its motion. It is given by KE = ½ × m × v², where m is mass in kilograms and v is velocity in metres per second, yielding energy in joules (J).
Because velocity is squared, kinetic energy grows very quickly with speed: doubling the speed quadruples the energy. This is why high-speed collisions are so much more destructive than slow ones, and why stopping distances increase dramatically as speed rises.
Frequently asked questions
Kinetic energy equals one half of mass times velocity squared: KE = ½mv². Use kilograms and m/s to get joules.
Kinetic energy depends on the square of speed, so doubling the velocity multiplies the energy by four. Speed matters far more than mass for energy.
It expects mass in kilograms and velocity in metres per second, and returns energy in joules, with kilojoule and kilocalorie equivalents.
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