Kinetic Energy Calculator
Calculate kinetic energy from mass and velocity.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
Can't find what you need?
Request a ToolHow to Use the Kinetic Energy Calculator
Enter the mass in kilograms and the velocity in meters per second. The calculator instantly computes the kinetic energy in joules.
About Kinetic Energy
Kinetic energy (KE) is the energy of motion. Any object with mass and velocity possesses kinetic energy equal to one-half times mass times velocity squared. This is one of the most fundamental quantities in physics. The work-energy theorem states that the net work done on an object equals its change in kinetic energy. Kinetic energy is a scalar quantity and is always non-negative.
Frequently Asked Questions
What is kinetic energy?
Kinetic energy is the energy an object possesses due to its motion. It depends on mass and the square of velocity: KE = 0.5mv2. It is always positive or zero.
Why does velocity matter more than mass?
Because velocity is squared in the formula, doubling the speed quadruples the kinetic energy, while doubling the mass only doubles it. This is why high-speed collisions are so destructive.
What are the units of kinetic energy?
Kinetic energy is measured in joules (J). One joule equals one kilogram meter squared per second squared (kg m2/s2).