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Soil Gradation Coefficients (Cu & Cc Uniformity & Curvature) Calculator

Easily calculate and compute soil gradation coefficients (cu & cc uniformity & curvature) calculator with accurate equations, live formulas, and expert guidance.

10% of soil particles are finer than this diameter.

30% of soil particles are finer than this diameter.

60% of soil particles are finer than this diameter.

Calculated Result
10 C_u ratio

Uniformity Coeff (C_u)

Uniformity Coeff (C_u)

10 C_u ratio

Coefficient Of Uniformity Cu

10

Coefficient Of Curvature Cc

1.41

Uscs Gradation Assessment

Well-Graded Sand (SW - Excellent engineering compaction)

10 — C_u ratio

Calculation Breakdown

  1. Applied FormulaClassifies soil grain size distribution curves computing the Coefficient of Uniformity ($C_u$) and Coefficient of Curvature ($C_c$) under the Unified Soil Classification System (USCS).C_u = \frac{D_{60}}{D_{10}}, \quad C_c = \frac{D_{30}^2}{D_{60} D_{10}}

Soil Gradation Cu & Cc Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.02.55.07.510Uniformity Coeff (C_u)

What Is the Soil Gradation Coefficients (Cu & Cc Uniformity & Curvature) Calculator?

This tool computes soil gradation coefficients (cu & cc uniformity & curvature) calculator with high precision arithmetic.

How Does the Soil Gradation Coefficients (Cu & Cc Uniformity & Curvature) Calculator Work?

Classifies soil grain size distribution curves computing the Coefficient of Uniformity (CuC_u) and Coefficient of Curvature (CcC_c) under the Unified Soil Classification System (USCS).

Soil Gradation Coefficients (Cu & Cc Uniformity & Curvature) Calculator Formula & Variables

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

Cu=D60D10,Cc=D302D60D10C_u = \frac{D_{60}}{D_{10}}, \quad C_c = \frac{D_{30}^2}{D_{60} D_{10}}

Classifies soil grain size distribution curves computing the Coefficient of Uniformity (CuC_u) and Coefficient of Curvature (CcC_c) under the Unified Soil Classification System (USCS).

How to Use the Soil Gradation Coefficients (Cu & Cc Uniformity & Curvature) Calculator

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

Step-by-Step Example Calculation

Soil Gradation Coefficients (Cu & Cc Uniformity & Curvature) Calculator Example

Input Values:

grainDiameterD10Mm:0.12
grainDiameterD30Mm:0.45
grainDiameterD60Mm:1.2
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required C_u ratio.

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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