// by seankriegler.com
Energy Calculator
Convert energy units and calculate kinetic & potential energy
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Result
KE = ½mv² — Calculate kinetic energy from mass and velocity
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Kinetic Energy (J)
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Kilojoules
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Calories
PE = mgh — Calculate gravitational potential energy
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Potential Energy (J)
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Kilojoules
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Watt-hours
// Energy Units
1 kWh = 3,600,000 J. 1 calorie = 4.184 J. 1 BTU = 1,055.06 J. Energy can be converted between all units without loss.
// Kinetic Energy
Kinetic energy is the energy of motion. Doubling velocity quadruples KE because it depends on v². That's why high-speed crashes are so dangerous.
// Potential Energy
Gravitational PE depends on mass, height, and gravity. On Earth g ≈ 9.81 m/s². On the Moon it's ~1.62 m/s², on Mars ~3.72 m/s².