Slenderness Ratio Calculator
Calculate the slenderness ratio (KL/r) for columns and determine buckling behavior. Classify columns as short, intermediate, or long.
Input Method
in
in
ksi
ksi
Slenderness Ratio (KL/r)
60.00
Intermediate Column
Inelastic buckling
Slenderness (KL/r)
60.00
Critical Cc
126.10
Radius of Gyration
2.000 in
Effective Length
120.00 in
Critical Stress (Fcr)
79.51 ksi
Allowable Stress (Fa)
19.12 ksi
Slenderness Limits
Short Column: KL/r < 50
Intermediate: 50 ≤ KL/r ≤ Cc (126.10)
Long Column: KL/r > Cc
Maximum Recommended: KL/r ≤ 200
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.