Beam Deflection

Calculate the maximum deflection of a simply supported beam.

Load Type

Load (N or N/m)

Span Length (m)

Young's Modulus E (GPa)

Second Moment of Area I (cm⁴)

About this calculator

Maximum mid-span deflection of a simply supported beam: δ = PL³ ÷ 48EI for a central point load, or 5wL⁴ ÷ 384EI for a uniformly distributed load.