ffee
All tools
Beam Load Calculator
Enter a point load at midspan or a uniform load and see the reactions, the maximum bending moment and the deflection.
Beam load calculator
Reaction at each support: —
Maximum bending moment: —
Maximum deflection at midspan: —
Deflection ratio: —
—
How to use the Beam Load Calculator
- Choose a point load at midspan or a uniformly distributed load.
- Enter the load and the span, then pick a material and a section.
- Read the reactions, the maximum bending moment and the deflection.
Features
- Point load and uniform load cases
- Reactions, maximum moment and deflection
- Four materials and four common sections
- Deflection checked against the L/250 limit
Advertisement
Frequently Asked Questions
Common questions about the free online beam load calculator.
Each support takes half the load when the beam and load are symmetric, so a 10 kN point load
gives 5 kN at each end.
For a point load at midspan it is the load times the span over four, and for a uniform load
it is the load times the span squared over eight.
Midspan deflection is the load times the span cubed, divided by 48 times the modulus of
elasticity times the second moment of area.
Midspan deflection is five times the uniform load times the span to the fourth power, divided
by 384 times E times I.
It describes how the shape of the section resists bending. A deeper section has a much larger
value and therefore deflects far less.
A common limit is span divided by 250 for general floors, and span divided by 360 where
finishes or plaster might crack.
No. The reactions and the bending moment depend only on the load and the span, while the
material stiffness changes only the deflection.
No. Every beam calculation runs in your browser, so the loads and sections you enter stay on
your own device.
Yes. It is completely free, needs no account, and you can check as many beams and load cases
as you like.
Last updated: October 10, 2026