InertiaCalculator is a structural utility program for calculating geometric and structural properties of built-up, custom, or composite cross sections for anyone who needs to calculate geometric or structural properties of plane areas. The purpose for InertiaCalculator is to help engineers determine properties of custom or combined sections for structural design. The tool has applications for architects, mechanical engineers, and others. It will calculate many properties including area, moment of inertia, section modulus, shear center location, principal axes and much more. No designer can afford to be without this powerful, easy-to-use, and ridiculously inexpensive tool.