The effect of fines content on cone penetration resistance and excess pore water pressure is not entirely known yet. In this study, CPTu, SCPT, and DPPT tests in a fixed wall laminar box were carried out to understand the effect of fines content with different relative densities on cone penetration resistance and excess pore water pressure in clean sand and sand with 5, 15, and 35 percent silty. This study was investigated by using the normalized penetration rate. The effect of normalized penetration rate accounted with penetration rate and coefficient of consolidation on drainage conditions and the value of transition from partially drained to drained conditions were investigated. According to the experimental data results, the effect of fines content on the coefficient of volume compressibility is minimal. However, as the fines content increase, the permeability and the coefficient of consolidation decrease considerably. The normalized cone penetration resistance decreases when the fines content increases in clean sand and silty sands at the same relative densities. When the relationship between normalized penetration rate and normalized cone penetration resistance is examined instead of only the fines at the same relative densities, the normalized cone penetration resistance decreased with the increasing normalized penetration rate. Due to a decrease in the coefficient of consolidation or an increase in the penetration rate, silty sands have a longer dissipation time of excess pore water pressure than clean sand. Hence, the clean sand remains drained, and the silty sands remain partially drained.