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Column Design Calculator (ACI-318)

Civil Engineering

29 Aug, 2026

ACI 318 · Short Column · Axial Design

Reinforced Concrete Column Designer

Calculate short tied (square/rectangular) or circular spiral column capacities according to ACI 318 code specifications.

Design Inputs

Factored axial load, P_u kips

f'_c psi

f_y psi

Target ρ_g 0.01–0.08

Long. bar

Modify column section Auto-size ON — tool picks the smallest practical dimension.

Width, b in · 2″ steps

Depth, h in · 2″ steps

Section is fixed to your values; the calculator solves the required steel and checks section adequacy.

Enter parameters and click Calculate Design to view section, reinforcement, and ACI checks.

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Reinforced Concrete Column Designer

Design Inputs

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