Section Modulus is also referred to as the Polar Modulus or the Torsional Sectional Modulus. It is denoted by *Z*_{p}. This is a Section Modulus Calculator.

## Section Modulus Formulas

Following is the formula to calculate the section modulus for the solid shaft

If it is the hollow shaft then

Where D_{o} is the outer diameter, D_{i} is the inner diameter.

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