Kinetic Energy Calculator
Translational kinetic energy KE = 1/2 m v squared. Mass in kilograms, speed in meters per second, energy in joules. Informational, not a safety rating or code approval.
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How to calculate kinetic energy
- Enter any two of mass, speed, and kinetic energy. Leave the unknown blank.
- Mass is kilograms. Speed is meters per second. Energy is joules.
- Read KE in joules from 1/2 m v squared. The default 1 kg at 10 m/s is 50 J.
- This is translational KE only. Nothing is uploaded.
Translational kinetic energy
KE = 1/2 m v squared
| Mass | m in kilograms |
|---|---|
| Speed | v in meters per second, not RPM |
| Energy | Joules (N m) |
| Formula | KE = 1/2 * m * v * v |
| Default | 1 kg at 10 m/s = 50 J |
| Not included | Rotation, relativity, or potential energy |
What kinetic energy is here
A moving mass stores 1/2 m v squared. Double the speed and KE rises by four. The default 1 kg at 10 m/s is 50 J. Units are SI: kg, m/s, joules.
Mass, speed, and the joule
Mass is not weight. Speed is the magnitude of velocity. A joule is one newton-meter. This page does not convert lb or mph. Density without motion lives on density.
How this page computes
Mass must be greater than 0. Speed may be 0, which gives KE of 0. The formula is translational only. Rotation needs a separate 1/2 I omega squared term this page does not add.
Limits
No drag, no impact rating, no relativistic gamma. Informational, not a safety rating or code approval. CZNull does not receive the values. See the disclaimer.