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Kinetic energy calculator

The energy of a moving object from its mass and speed, in joules, kilojoules, foot-pounds and watt-hours.

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Kinetic energy 578,704 J

How it works

KE = ½ m v²

Kinetic energy grows with the square of speed: a car at 100 km/h carries four times the energy it has at 50 km/h, which is why stopping distances and crash damage rise so fast with speed. Mass counts in a straight line, so a vehicle twice as heavy at the same speed carries twice the energy.

  1. Half the mass times the speed squared (SI units) ½ × 1,500 kg × (27.777778 m/s)² = 578,704 J

Printed from rocketcalc.io/physics/kinetic-energy