EX-Ante Carbon balance Tool (EX-ACT)

The Ex-Ante Carbon-balance Tool (EX-ACT) is an appraisal system developed by FAO providing estimates of the impact of agriculture and forestry development projects, programmes and policies on the carbon-balance. The carbon-balance is defined as the net balance from all greenhouse gases (GHGs) expressed in CO2 equivalent that were emitted or sequestered due to project implementation as compared to a business-as-usual scenario.

EX-ACT is a land-based accounting system, estimating C stock changes (i.e. emissions or sinks of CO2) as well as GHG emissions per unit of land, expressed in equivalent tonnes of CO2 per hectare and year. The tool helps project designers to estimate and prioritize project activities with high benefits in economic and climate change mitigation terms. The amount of GHG mitigation may also be used as part of economic analyses as well as for the application for additional project funds.

EX-ACT can be applied on a wide range of development projects from all AFOLU sub-sectors, including besides others projects on climate change mitigation, sustainable land management, watershed development, production intensification, food security, livestock, forest management or land use change. Further, it is cost effective, requires a compared small amount of data, and has resources (tables, maps) which can help finding the required information. While EX-ACT is mostly used at project level it may easily be up-scaled to the programme/sector level and can also be used for policy analysis.

All the material and resources related to EX-ACT are freely available for download from this website. For other language versions please refer to the navigation bar on top of the page.


  • NEW!! EX-ACT team trained on capacity development in carbon-balance appraisal of AFOLU, peatland restoration and policies projects for FAO experts, programme officers for ministries of Climate Change and Finance in Pakistan and Indonesia
  • NEW!! BLUE CARBON - FISHERIES & AQUACULTURE modules are on line (guideline and study cases). 
  • NEW!! EX-ACT Team is currently developing a new EX-ACT Version providing co-benefit appraisal of Value Chain on GHG emissions, climate resilience and income. EX-ACT VC

Use EX-ACT in English, French, Spanish, Chinese, Russian, Arabic, Portuguese, German and Bahasa Indonesia.

Learn to use EX-ACT through e-learning or face-to-face training workshops.

Choose the most adapted tool for your purposes.

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