Moment of Inertia Section Calculator Section Calculator – Half Circle April 22, 2016April 22, 2016 admin Circle Section, Cross Section Area, Moment of inertia, Moment of Inertia Calculator, Radius of gyration, Round Section, Section Calculator, Section Modulus W T C L Rectangle HRectangle HSquare Square Pipe Circle SemiCircle Triangle Diameter d: Radius R: Area is: Moment of Inertia is: Elastic Section Modulus is: Radius of Gyration is: Calculate Moment of Inertia for a Half Round section, find cross sectional area, section modulus and radius of gyration for a Half Round shape beam.