Beam Deflection Calculator

Calculate reactions, maximum bending moment, shear, deflection and bending stress for a simply supported beam with a point or uniform load.

Load case

Span

Point load

Material (E)

Second moment of area I

Get it from a section table or the Section Properties calculator.

Section modulus S (for stress) (optional)

Formula

Point at centre: M = PL/4, δ = PL³/(48EI); Uniform: M = wL²/8, δ = 5wL⁴/(384EI); σ = M/S