Kinetic energy Calculator

How to calculate kinetic energy

This tool calculates kinetic energy from Mass (kg), Speed (m/s). Enter each quantity in its labelled field, then use the formula below to check the calculation.

Formula

mass × speed² ÷ 2

Worked example

Mass (kg)

10

Speed (m/s)

5

Applying the formula to these values gives 125 J.

What should I check?

Use SI units to explore mechanics, waves and basic DC electrical arithmetic. These are idealised educational formulas, not engineering specifications.

Use the reset button to restore this example. Your inputs are processed in this browser and are not included in a shared calculator link. See our methodology and limitations.