Kinetic Energy Calculator – KE = ½ mv²

Calculate kinetic energy from mass and velocity using KE = ½ mv².

Mass (kg)

Velocity (m/s)

How It Works

Enter mass in kilograms and velocity in m/s. The calculator returns kinetic energy in Joules. You can also find mass or velocity from a known KE.

Formula

KE = ½ × m × v²

Frequently Asked Questions

What is kinetic energy?

Kinetic energy is the energy an object has due to its motion. A 2 kg ball moving at 3 m/s has KE = ½ × 2 × 9 = 9 J.

Why is velocity squared in the formula?

Kinetic energy grows quadratically with speed. Doubling speed quadruples kinetic energy, which is why high speeds in crashes are so dangerous.