The AFOLU Calculator employs IPCC-based accounting methods that allow users to estimate the CO2 benefits and potential climate impacts of eight different types of land-based project activities: forest protection, forest management, afforestation/reforestation, agroforestry, cropland management, grazing land management, forest degradation by fuelwood, and support/development of policies. Each of these tools within the AFOLU Calculator transparently documents the methods, discusses the assumptions, and presents the underlying data along with its associated sources of uncertainties.