Engineering & Construction
Beam Deflection Calculator
Estimate midspan deflection of a simply supported beam. A centre point load uses PL³/48EI. A uniform load uses 5wL⁴/384EI. This is not a design check.
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This runs entirely in your browser. Nothing you type is sent to a server.
How to use the Beam Deflection Calculator
- 1Choose a point load or a uniform load.
- 2Enter the load, the span, E and I.
- 3Read 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.