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Footing Design Calculator (ACI)

Civil Engineering

29 Aug, 2026

ACI Footing Designer

Square footing · US units · reinforced · shear + flexure checks

⚙️ interactive calculator

📊 Geotechnical & load

P_service kips

P_ult kips

q_{a gross} ksf

D_f ft

γ_soil pcf

🏗️ Structural & reinforcement

f'_c psi

f_y psi

column in

thickness in

bar size #

📋 Design summary square

Net bearing (q_net)—

Required area—

Footing size (B×B)—

Effective depth d—

One‑way shear —

Two‑way (punching) —

🧱 Reinforcement (each direction)

Required A_s (flexure) —

Provided A_s (#6 bars) —

Spacing (o.c.) —

ρ / ρ_min —

🖊️ blogher · structural toolkit

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ACI Footing Designer

📋 Design summary square

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