Potential Energy Calculator
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Kinetic Energy Calculator
Find the kinetic energy of a moving object from mass and velocity.
Kinetic energy
—
Joules.
| Mass | — |
|---|---|
| Velocity | — |
| — | |
| — |
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Enter your figures above to see the step-by-step working.
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How the Kinetic Energy Calculator Works
Kinetic energy is the energy of motion. It equals one-half the mass times the velocity squared, so it grows with the square of speed — double the speed and you quadruple the energy. A 10-kilogram object moving at 5 m/s carries 125 joules of kinetic energy.
Mass is in kilograms and velocity in meters per second, giving energy in joules. Because velocity is squared, speed matters far more than mass — which is why a small increase in speed makes a big difference in impact energy.
KE = ½ × mass × velocity²
Frequently Asked Questions
How do you calculate kinetic energy?
Multiply one-half the mass (kg) by the velocity (m/s) squared. The result is in joules.
Why is velocity squared?
Kinetic energy comes from the work done to accelerate an object, which scales with the square of speed. Doubling speed quadruples the energy.
What units does this use?
Mass in kilograms and velocity in meters per second give kinetic energy in joules, the SI unit of energy.
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