Kinetic Energy Calculator
Find the energy of a moving object with KE = ½·m·v².
The energy of motion
Kinetic energy measures how much work a moving object can do, and it depends on the square of speed. That squaring is why a small increase in velocity means a large jump in energy.
A 1500 kg car at 20 m/s carries 300,000 joules of kinetic energy; at 40 m/s it carries four times as much. This is the physics behind stopping distances and crash severity.
Instant and private
It applies the kinetic-energy formula in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What is kinetic energy?
The energy an object has because of its motion. It grows with mass and with the square of speed.
Why does speed matter so much?
Because it is squared: doubling speed quadruples the kinetic energy, which is why high-speed impacts are so much more severe.
What units are used?
Mass in kilograms and speed in metres per second give energy in joules.
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