What this calculator helps you find
Bending moment is related to the area under the shear-force diagram. For a simple span with no applied end moments, the bending moment is often zero at the supports; extrema usually occur where shear passes through zero.
Relevant formula
dM/dx = V(x)
Worked example
A 10 kN center load on a 10 m simply supported beam creates a maximum bending-moment magnitude of 25 kN·m at midspan. The diagram is linear on each side of the point load.
Use results responsibly
Use this tool for idealized, static two-dimensional analysis and for checking calculations. Confirm units, sign conventions, supports, material properties, and applicable design standards before using results in a project. Review the assumptions and limitations and validation records.