Formula Explanation
Deflection = PL^3 / (48EI)
This calculator applies the formula Deflection = PL^3 / (48EI). Enter each value with the matching unit, and AZCalculate updates the result instantly.
Engineering
Beam Deflection Calculator
Use this beam deflection calculator to calculate estimate center deflection of a simply supported beam with central load.
beam deflectionloadspanengineering
Calculator
Calculate instantly
Calculator Inputs
Choose what you want to calculate, enter realistic values, adjust units where shown, and use the scenario section for repeated-use planning.
Input and Formula Breakdown
This calculator applies the formula Deflection = PL^3 / (48EI). Enter each value with the matching unit, and AZCalculate updates the result instantly.
Central load
1,000 N
Span
3 m
Elastic modulus
200,000,000,000 Pa
Moment of inertia
0 m^4
Deflection
3.52e-4 m
Scenario and Comparison
Current
3.52e-4 m
Projected
0
Adjusted
0
Visual Comparison
Current result0
Projected usage0
Comparison scenario0
Sign in to save this calculation and access it later.
Use Cases
- Estimate deflection
- Compare material stiffness
- Plan early designs
Step-by-Step Explanation
- Step 1Enter the known values in the calculator fields.
- Step 2Keep the units consistent with the labels shown beside each input.
- Step 3Apply the formula: Deflection = PL^3 / (48EI).
- Step 4Review the primary result and supporting values.
Example calculation
Example beam deflection calculator
Given
- Central load: 1000 N
- Span: 3 m
- Elastic modulus: 200000000000 Pa
- Moment of inertia: 0.000008 m^4
Steps
- Use the values shown above.
- Apply Deflection = PL^3 / (48EI).
Result
The calculator above shows the computed answer instantly from these example values.
Calculator guide
About this Beam Deflection Calculator
Estimate center deflection of a simply supported beam with central load. This page includes an interactive calculator, concise formula notes, worked examples, FAQs, related calculators, and practical guidance you can revisit whenever needed.
Found something that does not look right?
We work hard to keep every calculator accurate and useful. If you notice a calculation error, missing option, or unclear explanation, please let us know so we can review and correct it promptly.
Calculator usage
See how many people are using this calculator.
Total visits today
0
Live users now
0
Total saved calculations
0
Most active date
2026-06-05
FAQ
Beam Deflection Calculator FAQs
How does the beam deflection calculator work?+
It uses Deflection = PL^3 / (48EI) and calculates the result from the values you enter.
Can I copy or print the result?+
Yes. AZCalculate calculator pages include copy, share, and print actions.
Related tools
Related Calculators
Engineering
Estimate equivalent bearing load from radial and axial loads.
Engineering
Estimate heat load from area, heat gain factor, occupants, and equipment.
Engineering
Calculate electrical load from voltage, current, power factor, and quantity.
Engineering
Estimate required cable area from current, allowable density, and safety factor.
Engineering
Estimate inverter size from continuous load, surge load, and safety factor.
Engineering
Estimate battery runtime from capacity, voltage, load, efficiency, and depth of discharge.