Determining hydraulic parameters is often very demanding, time-consuming and very expensive, so the assessment of these parameters with pedotransfer functions is increasingly being approached. Pedotransfer functions (PTF) are used as an alternative tool to predict the physical and chemical properties of soil from other more available analyzed properties. It is very important to achieve the hydraulic characteristics of the soil quickly and efficiently since they are necessary in various applications. Although there are a large number of different PTF methods, they all work on the same principle trying to determine soil properties, such as hydraulic conductivity given only a few measured soil properties such as particle size, soil texture and structure, density. With the development of technology, numerous numerical programs and models are being developed that can solve the problems of water flow and transport of various particles. They can work on the principle of PTF, and the most used are HYDRUS (Rosetta) and SOILPAR. Soil field data were collected at 35 locations throughout the Republic of Croatia, and a database of all basic characteristics on different soil types is used. The research was conducted on seven soil types and recorded features such as parent material, soil type, sand, silt and clay content, method of use, etc. Using the HYDRUS (Rosetta) program, the hydraulic characteristics of the soil were calculated from the basic soil parameters to obtain soil water retention curves.