Engineering & Construction
Beam Deflection Calculator
Estimate midspan deflection of a simply supported beam.
Free forever.
Elastic deflection of a simply supported beam. Point load uses PL³/48EI. Uniform load uses 5wL⁴/384EI. E and I are the values you enter. This is not a design check.
Result
Press Calculate.
Result
Press Calculate.
How to use the Beam Deflection Calculator
- Choose a point load or a uniform load.
- Enter the load, the span, E and I.
- Read the deflection and the midspan moment.
Questions
Which units does I use?
Centimetres to the fourth. E is in GPa. The load is kN, or kN per metre for a uniform load.
Does this check the beam?
No. It evaluates the elastic formula with the numbers you type.
This runs entirely in your browser. Nothing you type is sent to a server.