Free · SFD, BMD & deflection

Beam Analysis Calculator

Get reactions, shear force, bending moment and deflection for simply supported, cantilever, fixed and propped cantilever beams. Add any mix of point loads and UDLs, then read the diagrams and check deflection against span limits.

Beam & loads

Support condition

Span L (m)

Deflection limit

Loads (downward positive, x measured from A)

Material

Concrete grade

Young’s modulus E (MPa = N/mm²)

Section

Width b (mm)

Overall depth D (mm)

Moment of inertia I

Unit

Include self-weight (b × D × 25 kN/m³)

Results

Characteristic (unfactored) loads

Max moment (+)

—

Max moment (−)

—

Max shear

—

Max deflection

—

Diagrams

Sagging moment positive · deflection downward negative

Beam Analysis Calculator

Beam & loads

Results

Diagrams

Beam & loading

Shear force diagram (kN)

Bending moment diagram (kNm)

Deflected shape (mm)