Moment Capacity Calculator
Calculate flexural moment capacity of rectangular and T-beam concrete sections per ACI 318.
Section Properties
in
in
PSI
ksi
sq in
sq in
in
Design Moment Capacity (phi*Mn)
209.9 ft-kip
Nominal Mn = 233.2 ft-kip | phi = 0.90
Effective Depth d
21.50"
Stress Block a
3.47"
Neutral Axis c
4.08"
Beta1
0.850
Min Reinforcement: OK
rho = 0.915% vs rho_min = 0.333%
Ductility: OK (Tension Controlled)
epsilon_t = 1.280% vs 0.5% limit
Section Analysis:
Reinforcement Ratio0.915%
Maximum Ratio2.064%
Steel Strain1.280%
Strength Reduction phi0.90
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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.