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Column Buckling

Euler (long) with a Johnson-parabola transition for intermediate columns. Units: E and Sy in MPa, L and r in mm, A in mm² → critical stress MPa, critical load N. Get r and A from Section Properties.

Calculator

E (MPa)

Yield Sy (MPa)

End condition

Length L (mm)

Radius of gyration r (mm)

Area A (mm²)

Applied load P (N)

Eccentricity e (mm)

Fibre distance c (mm)

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Ideal column; apply your own safety factor. A helper, not a substitute for engineering judgment.