Civil Engineering Calculators
12 civil calculators in the Engineering Database. Each tool runs deterministic calculations against authoritative reference tables, so results trace back to source standards.
Anchor Bolt Design
Checks cast-in-place and post-installed anchor bolt capacity per ACI 318-19 Chapter 17. Evaluates steel tension, concrete breakout tension, steel shear, concrete breakout shear, and tri-linear tension-shear interaction. Supports cracked/uncracked concrete and seismic conditions.
Free with sign-inBearing Capacity
Calculates ultimate and allowable bearing capacity for shallow foundations using Terzaghi, Meyerhof, Hansen, or Vesic methods. Looks up bearing capacity factors (Nc, Nq, Nγ) from reference tables and applies shape, depth, and water table corrections.
Free with sign-inBolt Connection Design (AISC)
Designs and checks bolted connections per AISC 360 J3. Calculates bolt shear, tension, and combined capacity for single bolts and bolt groups. Supports A325, A490, SAE, and ISO bolt grades.
Free to useConcrete Beam Design Check (ACI)
Checks a reinforced concrete beam for flexural capacity, shear capacity, and reinforcement limits per ACI 318-19. Looks up rebar areas from reference tables and applies phi factors for strength reduction.
Free to useMasonry Wall Design Check (TMS 402)
Checks a masonry bearing wall for axial and flexural capacity using Allowable Stress Design (ASD) per TMS 402. Looks up masonry unit properties from reference tables, computes slenderness ratio, axial stress, bending stress from lateral load, and unity check.
Free with sign-inPile Foundation
Calculates ultimate and allowable axial capacity of driven piles using static analysis methods. Uses alpha method for clay (total stress) and beta method for sand (effective stress). Looks up pile section properties and bearing capacity factors from reference tables.
Free with sign-inRetaining Wall Stability
Checks stability of gravity and cantilever retaining walls. Calculates Rankine active/passive earth pressures, overturning and sliding factors of safety, bearing pressure, and eccentricity. Looks up soil properties and code-minimum safety factors from reference tables.
Free with sign-inSteel Beam Design Check (AISC)
Checks a steel W-shape beam for flexural capacity, shear capacity, and deflection per AISC 360-22. Looks up section properties from the AISC shapes table and evaluates compactness, lateral-torsional buckling, and demand/capacity ratios.
Free to useSteel Column Design Check (AISC)
Checks a steel W-shape column for axial compressive capacity per AISC 360-22 Chapter E. Looks up section properties from the AISC shapes table, calculates Euler buckling stress, critical stress (inelastic or elastic), nominal and design compressive strength, demand/capacity ratio, and element slenderness classification per Table B4.1a.
Free with sign-inStormwater & Open Channel
Calculates stormwater peak runoff using the Rational Method (Q = CiA) and open-channel flow using Manning's Equation. Supports circular (full and partial), rectangular, and trapezoidal channel shapes. Computes flow rate, velocity, Froude number, and flow regime. Looks up Manning's n and runoff coefficients from reference tables.
Paid tierWastewater Treatment Design
Sizes an activated sludge wastewater treatment system. Calculates aeration tank volume, hydraulic retention time, F/M ratio, sludge production, oxygen and air requirements, and secondary clarifier area. Uses biokinetic constants from reference tables and validates results against standard design parameter ranges.
Paid tierWood Beam Design Check (NDS)
Checks a sawn lumber beam for bending, shear, and deflection per NDS (National Design Specification). Looks up reference design values from the NDS timber table, applies adjustment factors (CD, CM, Ct, CL, CF, Cr), and evaluates demand/capacity ratios.
Free to use
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Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
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