In order to facilitate the different activities of targeting climate change mitigation in agriculture, decision makers can today choose from a wider range of available greenhouse gas (GHG) tools. These tools follow different main objectives (awareness raising, national reporting, (ex-ante) project evaluation, etc.), cover to a different extent all relevant GHGs as well as agricultural activities and are adapted to different geographical scales (farm, landscape, project, national scale). EX-ACT is targeted at providing project evaluations, characterized by relatively low data and cost requirements in order to fit with the requirements of a cost-effective investment project design process, as common in agricultural planning. The tool is able to accommodate certain location specificity (Tier 2) and thus exceeds pure Tier 1 functionality. Furthermore EX-ACT can accommodate all agricultural sub-sectors, a wide range of agricultural management practices and all types of GHGs and emission processes in the Agriculture, Forestry and Other Land Uses (AFOLU) sector, as well as for the fishery sector.