The liquid limit is an essential parameter that denotes the moisture content at which the soil transitions from the plastic state to the liquid state. It plays a vital role in the classification of soil materials based on their potential properties. By determining the liquid limit, we can assess the shearing resistance of the soil when mixed with water. The Casagrande Method or Cone Penetrometer Method can be used to determine the liquid limit accurately. These methods provide reliable and precise results, contributing to the accurate characterization of the soil material. Understanding the liquid limit is crucial for various fields of engineering, construction, and environmental sciences, and its significance in the research and development of soil materials cannot be overstated.