In the Water Resources Projects are serviced agriculture used ODA capital in Economics and financial benefits must be implemented in benefit assessment of project. Normally base on financial price is fixed by World Bank about main goods which relate to project, is calculated Standard Conversion Factor (SCF), Conversion Factor (CF) for some goods belong on localization in order to transfer to economics price, since then calculating conversion factors of economics and financials. Author introduces calculating method of SCF and CF of some goods and construction fee and presents results of some project at hqme and abroad, it can be to consult for making project used ODA capital.