USCS Soil Classifier
Interactive Plasticity Chart Dual Symbols Logic GW/SW Cu–Cc ChecksInputs | Enter data or use presets. Try the what‑if sliders below.
Slider mirrors the LL box; drag to see how classification changes.
Great for sensitivity checks near the A‑line and LL=50 boundary.
Tip: Gravel + Sand + Fines should sum to 100.
Use Tab to jump fields. Classification updates live.
Result
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Enter values or load a preset.
Cu = D60/D10, Cc = (D30²)/(D10·D60)
Plasticity Chart
A‑line: PI = 0.73(LL − 20). U‑line: PI = 0.9(LL − 8). LL = 50 separates L vs H.
Decision Trail
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Snapshot
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