Science & physics

Kinetic and potential energy

The energy of a moving or raised object, in joules, kilojoules and kWh.

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How it works

Kinetic energy KE = ½ m v² (v in m/s). Potential energy PE = m g h with g = 9.81 m/s². Drop height equivalent to the speed: h = v² / 2g.

Results are for guidance only and do not replace professional advice.

Worked example

With the default values:

  • Mass (kg)1200
  • Speed (km/h)50
  • Height (m)10

you get:

  • Kinetic energy115.741 kJ
  • Potential energy117.72 kJ
  • Total mechanical energy233.461 kJ (0.06485 kWh)
  • Drop height equivalent to the speed9.83 m

Frequently asked questions

How does the “Kinetic and potential energy” tool work?

Kinetic energy KE = ½ m v² (v in m/s). Potential energy PE = m g h with g = 9.81 m/s². Drop height equivalent to the speed: h = v² / 2g.

What do I need to enter?

Just fill in: mass, speed, height. The result updates as you type.

Can you give an example?

Mass (kg): 1200; Speed (km/h): 50; Height (m): 10 → Kinetic energy: 115.741 kJ; Potential energy: 117.72 kJ.

Is this calculator free, and is my data private?

Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.