Classical physics calculator
Moment of Inertia Calculator
Calculate mass moment of inertia for common idealized rigid bodies and explicit rotation axes.
Inputs
Result
Initializing.
Formula and worked example
The tool applies the selected ideal rigid-body formula: mr², ½mr², ⅖mr², ¹⁄₁₂mL², or ⅓mL². Example: a 2 kg point mass at 3 m has I = 18 kg·m².
Scope and limitations
Mass moment only—not area moment, section properties, composite bodies, parallel-axis shifts, products of inertia, or structural certification.