About the Shear Force Calculator
Shear force along a simply supported beam and the average shear stress in the web.
Also known as: shear diagram, shear force formula, beam shear calculator.
How to use this calculator
- Enter span, distributed load, additional central point load, distance from the left support and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
V(x) = R − wx · V_max = wL/2 + P/2
Worked example
Using the values pre-filled in the calculator above:
- Span = 6 m
- Distributed load = 12 kN/m
- Additional central point load = 0 kN
- Distance from the left support = 1 m
- Shear area (optional) = 2,000 mm²
the calculator returns:
- Shear at 1 m: 24 kN
- Maximum shear (at supports): 36 kN
- Shear is zero at: 3 m
- Total load: 72 kN