Home · Calculators

Beam deflection

Constant EI. No shear deflection.

CaseSimply supported, UDLCantilever, point load at tip

Span L (m)

UDL w (kN/m)

Tip load P (kN)

E (kN/mm²)

I (m⁴)

CalculateReset

Method

Simply supported: δ = 5wL⁴/384EI. Worked case: 8 kN/m, 6 m, E 210 kN/mm², I 0.0001 m⁴ is 6.43 mm. Cantilever tip: δ = PL³/3EI.

Not a span/250 check and not a section design.

Logic: how this figure is built.

Last checked 2 October 2026. See the common-calculations note and the disclaimer.