Mechanical, Structural, and Civil Engineering Calculators

This hub brings together the calculators that mechanical, structural, and civil engineers reach for daily — beam reactions and deflection, bending and shear stress, section modulus and moment of inertia, column buckling, gear and belt-drive ratios, torque, bearing capacity, concrete mix design, rebar spacing, slope stability, and earth pressure. Each tool returns the governing formula, intermediate steps, and the final result so the numbers can be checked by hand or pasted straight into a calculation note.