MR3

Modulus of Subgrade Reaction (kₛ) — Interactive Calculator

Based on ranges from Das (1999) and IS:2950 (Part I)–1981. Enter foundation data to compute kₛ, visualize springs, and compare both references.

Data Source Das (1999) IS:2950 (Part I)–1981 Soil Family Sand (dry/moist) Sand (saturated) Clay Condition / Density Width B (m) Length L (m) Applied Pressure q (kN/m²) Or Desired Settlement s (mm)

Comparison: Das (1999) vs IS:2950

Soil Type	Das (MN/m³)	IS:2950 (MN/m³)