Polar Moment of Inertia calculator

The polar moment of inertia is a property of the shaft’s cross-sectional area and is needed to calculate torsional stress. For a circular shaft with radius , the polar moment of inertia is given by:

where:

  • = Polar moment of inertia (in meters to the fourth power, m⁴)
  • = Radius of the shaft (in meters, m)

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