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Instant calculation
Enter the data and press the button to get the result.
Online Calculator
Kinetic energy calculator
Enter the mass and speed of an object to calculate its kinetic energy.
Information
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Local processing
The calculation is done directly in your browser.
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Free
No registration, external API or subscription required.
Frequently asked questions
What is the kinetic energy formula?
Ec = ½ × mass × velocity².
What units does it use?
Kilograms for mass, meters per second for speed and joules for energy.
Does it also display kJ?
Yes.
Is that a relativistic calculation?
No. It uses the classical mechanics formula.