Kinetic Energy Calculator

If you know the mass and velocity of an object, use the kinetic energy calculator to find it's energy in movement.

Kinetic energy calculator is a tool which helps you assess the energy of motion. It is based on the kinetic energy formula, which applies to every object which has vertical or horizontal motion.

The following part of the article will explain:

  • What kinetic energy is
  • How the kinetic energy formula is used
  • The definition of kinetic energy
  • What the difference between potential and kinetic energy is

Kinetic energy definition

The encyclopedia provides the following definition of kinetic energy:

The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

What is kinetic energy?

Kinetic energy is the energy of an object in motion. It defines how the mass of an object influences its velocity. Let's take an example. If you put the same engine into a lorry and a slick car, the former is not able to achieve the same speed as the latter because of its mass.

Kinetic energy formula

Kinetic energy formula defines the relationship between the mass and the velocity of an object. The equation is as follows:

KE = 0,5 * m * v²


  • m - mass
  • v - velocity

You should be aware, however, that this formula doesn't take into account relativistic effects, which begin to be noticeable by higher speeds. If an object is moving faster than with 1% of the speed of light, you should use our relativistic kinetic energy calculator.

Use our kinetic energy calculator. This tool will make the calculations for you after typing the mass and velocity of an object. If you don't know the speed of the object, you can easily calculate it with our velocity calculator.

Potential and kinetic energy

Potential energy refers to the gravitational pull exerted on an object, relative to how far it has to fall. When the object gains altitude, its potential energy increases. If you want to check what potential energy is and how to calculate is, use our potential energy calculator.

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Kinetic Energy Calculator