Spt

SPT Bearing Capacity Calculator

This calculator estimates the allowable net bearing capacity of shallow foundations in sand using SPT N-value as per IS 6403:1981. Note: Use corrected average N-value from base to 2B depth. Units: m, kN/m³, kPa.

SPT N-value: Width B (m): Length L (m): Depth Df (m): Unit weight γ (kN/m³): Water table depth Dw from ground (m) (large value if no water table): Factor of Safety (FOS):