Science

Kinetic Energy

Calculate kinetic energy, mass, or velocity using the physics formula KE = ½mv².

Reviewed & Maintained by

Aadil Malik — Software Engineer

1 min read · 27 words

What is a Kinetic Energy Calculator?

A kinetic energy calculator solves for translational kinetic energy, mass, or velocity using the classical mechanics formula $KE = \frac{1}{2}mv^2$.

Frequently Asked Questions

Kinetic energy is the energy an object possesses due to its motion: KE = 0.5 * m * v².

The Joule (J), where 1 Joule = 1 kg * m²/s².

Because velocity is squared ($v^2$), doubling velocity quadruples ($4\times$) the kinetic energy.

Net work done on an object equals the change in its kinetic energy: W_net = ΔKE.

Kinetic energy is energy of motion; potential energy is stored energy due to position or configuration.

No. Mass is positive and velocity squared is always positive, so translational KE is always $\ge 0$.

Energy of rotating bodies: KE_rot = 0.5 * I * ω² (where I is moment of inertia and ω is angular velocity).

At speeds approaching the speed of light, Einstein's relativistic equation must be used: KE = (γ - 1) * m * c².