FREE Calculator


Select your units then click "Add Beam" to begin. Watch this video if you're unsure how to use the beam calculator.
Need more functionality? SkyCiv offers a powerful cloud based Structural Analysis Software on monthly subscriptions!
Force Units:

Length Units:


Solve Now
Type Point Location Point Magnitude Start Location End Location Start Magnitude End Magnitude Edit/Delete
Please select your units and add a beam to begin...

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SkyCiv has a Student account, offering the SkyCiv Truss Software - allowing you to solve larger structures, with more supports and forces. SkyCiv also offers a full Structural Analysis Software in the cloud, complete with professional reporting, 3D Rendering and Stress Analysis. If you have any questions with the account types, simply contact us.


Free

$0 USD per month

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  • 5 Saved Files
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$19.99 USD per month

  • Full Software Access
  • 10 Saved Files
  • Public File Storage
  • SkyCiv Student Watermark
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$79.95 USD per month

  • Full Software Access
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Welcome to our free online bending moment and shear force diagram calculator which can generate the Reactions, Shear Force Diagrams (SFD) and Bending Moment Diagrams (BMD) of a cantilever or simply supported beam. Use this beam span calculator to determine the reactions at the supports, draw the shear and moment diagrams for the beam and calculate the deflection of a steel or wood beam.

Use the table above to view and delete the beam length, supports and added loads. Any changes made will automatically re-draw the free body diagram of your simply supported or cantilever beam. The beam reaction calculator and Bending Moment Calculations will be run once the "Solve" button is hit and will automatically generate the Shear and Bending Moment Diagrams. You can also click the individual elements of this lvl beam calculator to edit the model.

The above steel beam span calculator is a versatile structural engineering tool used to calculate the bending moment in a aluminium, wood or steel beam. It can also be used as an i beam load capacity calculator by using it as a bending stress or shear stress calculator. It is able to accommodate up to 2 different concentrated point loads, 2 distributed loads and 2 moments. The distributed loads can be arranged so that they are uniformly distributed loads (UDL), triangular distributed loads or trapezoidal distributed loads. All loads and moments can be of both upwards or downward direction in magnitude, which should be able to account for most common beam analysis situations. Bending Moment and Shear Force calculations may take up to 10 seconds to appear and please note you will be directed to a new page with the reactions, shear force diagram and bending moment diagram of the beam.

One of the most powerful functions is using it as a beam deflection calculator (or beam displacement calculator). This can be as a simply supported beam or to find the deflection of a cantilever beam. Being able to add section shapes and materials, this makes it useful as a wood beam calculator or as a steel beam calculator for lvl beam or i beam design. For now, this functionality is available in SkyCiv Beam.