Point-mass moment of inertia
Point-mass moment of inertia: use mass, distance from axis. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
I = mr²
Variables & units
- Mass
- kg · minimum 0, maximum 1000000000000
- Distance from axis
- m · minimum 0, maximum 1000000000000
Worked example
Use the displayed example inputs, then follow the substituted values in the solution.
Assumptions
Point-mass model. Extended shapes have different moments of inertia.
References
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
Calculated on your device. Your latest 100 calculations stay in this browser.