🏗Civil Engineering Calculators

Beams, drainage, foundations, retaining walls. 8 free tools with transparent formulas and quick results.

Beam Deflection

Calculate maximum deflection for simply-supported beams under uniform load. Instant results, serviceability ch...

Concrete Mix Design

Calculate concrete mix proportions using ACI 211.1. Outputs w/c ratio, cement, water, fine and coarse aggregat...

Hazen-Williams Pipe Flow

Calculate pipe flow velocity and flow rate using the Hazen-Williams equation. Instant hydraulic results with v...

Retaining Wall Stability

Check overturning and sliding stability of gravity retaining walls using Rankine earth pressure. Calculates Fo...

Footing Bearing Capacity

Calculate ultimate and allowable bearing capacity of shallow footings using Terzaghi's equation with Meyerhof ...

Storm Drain Sizing

Calculate required storm drain pipe diameter using Manning's equation. Returns minimum and nominal pipe size w...

Earthwork Cut & Fill Volume

Calculate earthwork cut and fill volumes using the prismatoid formula from cross-section areas. Includes swell...

Slope Stability

Calculate slope stability factor of safety using the infinite slope method. Enter cohesion, friction angle, un...