Soil Bearing Capacity Calculator
Calculate ultimate and allowable soil bearing capacity using the Terzaghi method.
Enter cohesion, friction angle, and depth to get safe foundation loads.
Bearing Capacity
Terzaghi Bearing Capacity Formula qu = c·Nc + γ·Df·Nq + 0.5·γ·B·Nγ
Where c = cohesion (kPa), γ = unit weight (kN/m³), Df = foundation depth (m), B = foundation width (m), and Nc, Nq, Nγ are bearing capacity factors.
Safe Bearing Capacity qs = qu / FS — where the factor of safety FS = 3.0 is standard practice for foundations.
Foundation Types Strip, square, and circular foundations have different shape correction factors applied to the formula.