# Torsion Constant for Circle Cross-section

## Torsion Constant for Circle Cross-section formula

\(\large{ J = \frac{\pi \; d^4}{32} }\) |

### Where:

\(\large{ J }\) (Greek symbol alpha) = torsion constant

\(\large{ d }\) = diameter of the circle

\(\large{ \pi }\) = Pi

Tags: Equations for Strain and Stress Equations for Constant Equations for Torsion Constant