Buckling Calculator
Calculate Euler's critical buckling load.
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Request a ToolHow to Use the Buckling Calculator
Enter material properties and column geometry.
- Enter elastic modulus and moment of inertia.
- Enter column length.
- Select end conditions to set the effective length factor.
- Read the result in kN.
About the Buckling Calculator
Euler's buckling formula predicts the critical load at which a slender column will buckle (suddenly deflect laterally). The critical load depends on the column's stiffness (EI), length, and end conditions. Columns with fixed ends can support higher loads than pin-ended columns. This formula applies only to long, slender columns where elastic buckling governs, not to short columns that fail by crushing.
Frequently Asked Questions
What is the effective length factor?
K accounts for end conditions: K=1 for pin-pin, K=0.7 for fixed-pin, K=0.5 for fixed-fixed, and K=2 for fixed-free (cantilever). Lower K means the column is more restrained and can support higher loads.
When does Euler's formula not apply?
It does not apply to short, stocky columns where the material yields before buckling occurs. Use the slenderness ratio to determine which failure mode governs.
How can I increase buckling resistance?
Increase the moment of inertia (use a larger or hollow cross-section), reduce column length, add intermediate bracing, or improve end fixity.