EVERYDAY CLARITY
Rotational Kinetic Energy Calculator
How much rotational kinetic energy does this inertia store? Enter the stated inputs to calculate this model.
Your result
Rotational kinetic energy
J
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Mass moment of inertia (kg·m²) | Enter mass moment of inertia in kg·m²; use the same basis as the other measurements. |
| Angular speed (rad/s) | Enter angular speed in rad/s; use the same basis as the other measurements. |
Understanding your result
Read Rotational kinetic energy (J) in the units and model stated on this page. The formula energy=inertia*omega*omega/2 defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
How much rotational kinetic energy does this inertia store?
How much rotational kinetic energy does this inertia store? Enter the stated inputs to calculate this model.
Common uses
- How much rotational kinetic energy does this inertia store
How it works
energy=inertia*omega*omega/2
Worked example
Enter Mass moment of inertia: 2 kg·m²; Angular speed: 3 rad/s. Results: Rotational kinetic energy: 9 J.