**About Consistency Index Calculator (Formula)**

The Consistency Index (CI) is a soil mechanics parameter that is used to describe the consistency or stiffness of a soil. It is calculated using the liquid limit (LL), natural moisture content (NMC), and plasticity index (PI) of the soil sample.

**The formula for calculating the Consistency Index is:**

**CI = (LL – NMC) / PI**

**Where:**

LL = Liquid limit of the soil sample NMC = Natural moisture content of the soil sample PI = Plasticity index of the soil sample

The liquid limit (LL) is the water content at which a soil sample changes from a plastic to a liquid state when it is subjected to a specified number of blows in a standardized test. The natural moisture content (NMC) is the water content of the soil sample in its natural state. The plasticity index (PI) is the difference between the liquid limit and the plastic limit of the soil sample.

The Consistency Index is an important parameter for the characterization of soil properties and is used in the design of foundations, earthworks, and other geotechnical engineering applications. It provides an indication of the stiffness of the soil and can help engineers to determine the suitability of a site for construction.

The Consistency Index Calculator is a tool that is used to calculate the Consistency Index of a soil sample based on the liquid limit, natural moisture content, and plasticity index of the sample. It is often used in geotechnical engineering and soil mechanics to analyze soil properties and to design structures that are supported by the soil.