Beam calculator

Reactions, shear force, bending moment and deflection — with every step of the calculation shown.

FREE · NO SIGN-UP v1.0.0 · verified against 10 textbook cases

INPUTUNITS: SI · kN · m

1 · Supports

2 · Span length m

3 · Loads down and clockwise are positive

4 · Material & section Material Section

5 · Deflection limit

Results update as you type. Self-weight is not included unless added as a distributed load.

MODELsimply supported · 2 loads

REACTION R_A43.33 kN

REACTION R_B36.67 kN

M_MAX · x = 2.33 m67.22 kN·m

δ_MAX · x = 2.91 m14.00 mm

SHEAR FORCE V(x) [kN]

BENDING MOMENT M(x) [kN·m]

DEFLECTION δ(x) [mm]

Indicative checks only — not a full EN 1993 member verification (no lateral-torsional buckling, shear or local checks).

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HOW IT'S CALCULATED · WITH YOUR NUMBERS

Step by step, with your numbers

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Reference: standard beam formula tables, e.g. Roark's Formulas for Stress and Strain.

BEYOND A SINGLE BEAM