Are these calculators free?

Yes. Every tool on PolyCalc is free to use in the browser with no sign-up.

What method does the beam calculator use?

The direct stiffness (matrix) method, which gives exact results for statically determinate and indeterminate beams.

Can I use PolyCalc for the FE Civil exam?

Use the FE section to practice worked problems. The exam itself only allows the NCEES-supplied reference handbook and an approved calculator.

PolyCalc: Free Beam, Truss & Civil Engineering Calculators

Free civil engineering calculators

PolyCalc is a set of free structural analysis tools for engineering students and practising engineers. Model a beam above, or pick another calculator below. Every tool runs in the browser and shows its working.

Beam calculatorReactions, shear and moment diagrams for pin, roller and fixed supports.
Shear and moment diagramsSFD and BMD for any beam and load case.
Bending moment calculatorMaximum bending moment and where it occurs.
Shear force calculatorShear force diagram and maximum shear.
Support reaction calculatorReactions for simple, cantilever and continuous beams.
Truss calculatorMember forces, tension or compression, and reactions.
Mohr's circlePrincipal stresses, maximum shear and principal angle.
Centroid calculatorCentroid, area and moment of inertia of built-up shapes.
Section propertiesArea, I, product of inertia and principal axes of any polygon.
2D frame calculatorReactions and member end forces for plane frames.
3D frame calculatorSpace frame displacements with the stiffness method.
Shaft torsionShear stress and angle of twist for circular shafts.
Unit converterpsi, ksi, ksf, kPa, kips, kN, kip-ft and N·m.
FE Civil practiceFree FE exam practice problems with worked solutions.

Frequently asked questions

Are these calculators free?: Yes. Every tool on PolyCalc is free to use in the browser with no sign-up.
What method does the beam calculator use?: The direct stiffness (matrix) method, which gives exact results for statically determinate and indeterminate beams.
Can I use PolyCalc for the FE Civil exam?: Use the FE section to practice worked problems. The exam itself only allows the NCEES-supplied reference handbook and an approved calculator.