Shear Force & Bending Moment Calculator

Simply supported beam with a point load. Enter beam span, load, and load position.

Beam Span L (m)

Point Load P (kN)

Load Position from Left Support a (m)

Max Bending Moment

kN·m

Reaction at A (RA)

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Reaction at B (RB)

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Max Shear Force

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Moment at Load Point

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Simply Supported Beam — Point Load

RA = P × b / L (where b = L − a)

RB = P × a / L

M_max = RA × a = P × a × b / L

Max Shear = max(RA, RB)

Section properties.

Material stress.

Beam deflection.

Weld strength.

Gear design.

Kinematics.