Maker & Reference
Kinetic Energy Calculator
Kinetic energy of any moving object. Doubling speed quadruples energy. Useful for physics, bullet ballistics, vehicle crash energy.
Result
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- Formula
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- Units
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- In ft-lb (if energy)
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FAQ
Why v squared? +
Double the speed = 4× the energy. Crash forces scale with v² which is why highway speeds are so much more dangerous than city speeds.
Bullet energy units? +
Foot-pounds in US, joules elsewhere. 1 ft-lb ≈ 1.36 J. A .22 LR has ~120 ft-lb. A .308 has ~2,700 ft-lb.