Liquid Limit Calculator


In soil mechanics, determining the liquid limit of soil is crucial for understanding its behavior under different conditions. A liquid limit calculator simplifies this process, offering an efficient means to compute this critical parameter.

How to Use:

Using the liquid limit calculator is straightforward. Enter the required values into the designated fields, and with a click of the “Calculate” button, the calculator will swiftly provide the liquid limit.


The liquid limit (LL) of soil can be determined using the Casagrande method, expressed as:

LL = W1 + (W2 – W1) × (N/10)


  • LL is the liquid limit
  • W1 is the initial moisture content of the soil
  • W2 is the moisture content of the soil at the boundary between the liquid and plastic states
  • N is the number of blows required for the soil to close a groove of standard dimensions

Example Solve:

Let’s consider an example where:

  • W1 = 20%
  • W2 = 30%
  • N = 25

Using the formula:

LL = 20 + (30 – 20) × (25/10) = 20 + 10 × 2.5 = 20 + 25 = 45%

Therefore, the liquid limit of the soil sample is 45%.


Q: What is the significance of the liquid limit in soil mechanics?

A: The liquid limit indicates the moisture content at which a soil transitions from a plastic to a liquid state, influencing its engineering properties such as shear strength and compressibility.

Q: Can the liquid limit be determined by visual inspection alone?

A: While visual inspection can provide some indication, precise determination requires standardized laboratory tests like the Casagrande method.


The liquid limit calculator streamlines the process of determining this vital parameter in soil mechanics, providing engineers and researchers with accurate results efficiently.

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