About the Kinetic Energy Calculator
Find the kinetic energy of a moving object. This tool is free, works in your browser and needs no sign-up.
How to use the Kinetic Energy Calculator
Enter the mass in kilograms and the speed in metres per second.
Formula used
Kinetic energy = ½ × mass × speed².
Example
With Mass (kg) 10, Speed (m/s) 5, the calculator shows: Kinetic energy = 125 J; In kilojoules = 0.125 kJ.
Frequently asked questions
Is the Kinetic Energy Calculator free to use?
Yes. It is completely free and you can use it as many times as you like.
How accurate is the Kinetic Energy Calculator?
The calculator uses standard formulas, so the maths is exact. Real life results can differ because of fees, taxes, rounding or personal factors, so treat the answer as an estimate.
Do you store the numbers I enter?
No. All calculations run in your browser. The values you type are not sent to our server.
Disclaimer: results are estimates for information only. They are not financial, medical or professional advice.