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The cone penetration or cone penetrometer test (CPT) is a method used to determine the geotechnical engineering properties of soils and delineating soil stratigraphy. It was initially developed in the s at the Dutch Laboratory for Soil Mechanics in Delft to investigate soft soils. Based on this history it has also been called the "Dutch cone test".

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Cone Penetration Testing The modern electric piezocone penetrometer (CPTu) sets the standard for cone penetration tests and geoenvironmental soil characterization. Adding additional modules and sensors, the basic CPTu tool can be expanded to collect specialized geophysical, geotechnical, and geoenvironmental data in addition to the basic parameters.

Seismic Cone Penetration Testing (SCPT) sounding provides a rapid and cost-effective method for directly measuring shear wave velocity of soils in situ. Shear wave velocity is used as an index of liquefaction resistance since both are influenced by many of the same factors. Alternatives to using SCPT for these geotechnical analysis can require laboratory testing or less reliable, highly empirical assessments.

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