The Regional Office for Asia and the Pacific (RAP) of the Food and Agriculture Organization of the United Nations (FAO) has recently secured funds to continue a program of training on ReWaS, which is a simple tool to estimate the potential for generating real water savings from various agronomic, water management and technical practices in irrigated agriculture. The tool was developed by FutureWater as part of FAO RAP’s developing regional program on water scarcity in Asia and the Pacific. So far successful trainings have been held in Nepal, Vietnam, Malaysia and Iran. The training program will now be extended to Bangladesh, India, Indonesia, Afghanistan and Thailand. By the end of the training, participants will have a solid understanding of the linkages between field interventions and basin-scale hydrology, in addition to being able to quantify these impacts.