Useful tool to help irrigation management, providing the PET (Potential Evapotranspiration) for anywhere in the world. It estimates the amount of water that evapotranspirate from the soil-plant-atmosphere system, contributing to the water management good practices. Group of Agrometeorological Studies (FCAV/UNESP - Jaboticabal) Walter Maldonado Jr Taynara Tuany Borges Valeriano Glauco de Souza Rolim