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Casagrande Plasticity Chart & USCS Fine-Grained Soil Classification Calculator

Easily calculate and compute casagrande plasticity chart & uscs fine-grained soil classification calculator with accurate equations, live formulas, and expert guidance.

Water content at Casagrande cup 25 drops.

Water content at 3mm soil thread crumbling.

Calculated Result
26 %

Plasticity Index PI

Plasticity Index PI

26 %

Plasticity Index P I

26

A Line Boundary Pi Value

20.4

U Line Upper Limit Pi Value

36

Uscs Soil Classification

CL (Lean Clay of Low-to-Medium Plasticity)

26 — %

Calculation Breakdown

  1. Applied FormulaClassifies fine-grained silts and clays per the Unified Soil Classification System (USCS / ASTM D2487) using Casagrandes Plasticity Chart and A-Line boundary equation.PI = LL - PL

Casagrande Plasticity USCS Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.06.5132026Plasticity Index PI

What Is the Casagrande Plasticity Chart & USCS Fine-Grained Soil Classification Calculator?

This tool computes casagrande plasticity chart & uscs fine-grained soil classification calculator with high precision arithmetic.

How Does the Casagrande Plasticity Chart & USCS Fine-Grained Soil Classification Calculator Work?

Classifies fine-grained silts and clays per the Unified Soil Classification System (USCS / ASTM D2487) using Casagrandes Plasticity Chart and A-Line boundary equation.

Casagrande Plasticity Chart & USCS Fine-Grained Soil Classification Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

PI=LL−PLPI = LL - PL

Classifies fine-grained silts and clays per the Unified Soil Classification System (USCS / ASTM D2487) using Casagrandes Plasticity Chart and A-Line boundary equation.

How to Use the Casagrande Plasticity Chart & USCS Fine-Grained Soil Classification Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Casagrande Plasticity Chart & USCS Fine-Grained Soil Classification Calculator Example

Input Values:

liquidLimitLlPercent:48.0
plasticLimitPlPercent:22.0
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required %.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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