Concrete Column Design Calculator
Design reinforced concrete columns per ACI 318: calculate gross area, steel area, steel ratio, and axial load capacity.
Inputs
MPa
MPa
mm
mm
bars
mm
(1=tied, 2=spiral)
Results
Axial Load Capacity (φPn)
2,958,571 N
Adequate Steel Ratio?
1 (1=yes, 0=no)
Gross Area (Ag)160,000 mm²
Steel Area (Ast)4,080 mm²
Steel Ratio (ρ)0.03
How to Use This Calculator
- Enter the factored axial load (Pu) and factored moment (Mu) in kN and kN-m.
- Set the concrete compressive strength (f'c) and steel yield strength (fy).
- Input the column cross-section dimensions in mm.
- Review the Required Steel Ratio, Reinforcing Bar Count, and Slenderness Check.
- Ensure the Steel Ratio falls between 1% and 8% per ACI 318 requirements.
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