The Pressure Meter Test is an in-situ geotechnical test used to evaluate the mechanical properties of soil and rock, particularly their strength and deformation characteristics. In this test, a cylindrical pressure meter is inserted into a borehole, and pressure is applied to the walls of the meter, causing the soil to deform. The resulting pressure and corresponding volume change are measured to assess the soil’s behavior under stress. This test provides valuable data on parameters such as the elastic modulus, lateral pressure, and undrained shear strength of cohesive soils. One of the primary advantages of the Pressure Meter Test is its ability to simulate actual loading conditions, allowing for a more accurate assessment of soil behavior in situ compared to laboratory tests. It is particularly useful in soft and saturated soils, as well as in determining the stability of slopes and foundations. However, the test requires careful execution and interpretation, as results can be influenced by factors such as soil type, depth, and stress history.