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Soil Phase Relationships & Weight-Volume Calculator

Interconversion of soil index properties and a 3-phase weight-volume solver (ASTM D7263 / D2216 / D854).

Enter Known Index Properties (Any 3–4 parameters)
Water content ratio (w = Ww / Ws)
Solid grain specific gravity
e = Vv / Vs
Sr = Vw / Vv (100% = Saturated)
n = Vv / V = e / (1 + e)
Total moist unit weight
γd = Gs·γw / (1 + e)
Unit weight when Sr = 100%
Direct Laboratory Specimen Measurements
Initial sample mass before drying
Mass of soil solids after oven-drying
Total volume of trimming cylinder
Specific gravity of soil particles

Free and open-source. You can buy me a coffee to support this project.