Polar Moment of Inertia Calculator
Free calculate polar moment of inertia for solid and hollow circular cross sections. determine torsional resistance.
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Polar Moment of Inertia Formula
Solid Circle
J = π × d⁴ / 32
Where:
- • J = polar moment of inertia (m⁴)
- • d = diameter (m)
Hollow Circle
J = π × (D⁴ - d⁴) / 32
Where:
- • J = polar moment of inertia (m⁴)
- • D = outer diameter (m)
- • d = inner diameter (m)