Radius of Gyration of rectangular solid section is the square root of the moment of inertia of a solid rectangular section to the cross sectional area of that solid rectangular body.

## Radius of Gyration of Rectangle Formula

Mathematically, radius of gyration of rectangular section can be expressed as;

\(K=sqrt{frac{I}{A}}=sqrt{frac{db^{3}/12}{bd}}\)..

\(K=frac{b}{sqrt{12}}\)