// multi-utility computation suite · offline · instant · precise
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sci.soil-atterberg-plasticity Calculator
Calculates Atterberg limits (liquid limit LL, plastic limit PL, plasticity index PI = LL−PL) for fine-grained soil classification on the Casagrande plasticity chart. High plasticity clays (LL > 50, PI > 20) have high shrink-swell potential — black cotton soils (LL > 60) cause severe infrastructure damage in semi-arid regions.
Inputs
Ll Pct
Reference formula or conversion factor shown for context.
Pl Pct
Reference formula or conversion factor shown for context.
Field Water Pct
Reference formula or conversion factor shown for context.
Results
plasticity index PI
A normalised score comparing the result to a reference baseline.
liquidity index LI
Depth of the market — how much can be bought or sold without significant price impact. Thin liquidity amplifies volatility.
soil state from LI
The value at the specified point or condition.
A-line value at LL (Casagrande chart)
The computed numeric or monetary value.
soil classification
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.
PI classification
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.