The Carbon Footprint Calculator is a calculator/spreadsheet used to estimate the carbon footprint for a containment system and can be used for the following applications: environmental, mining, potable water, energy development, waste containment, and other infrastructure applications.. The calculator is based on the analyses presented in Athanassopoulos and Vamos (2011) and yields estimates of the carbon footprint (or equivalent greenhouse gas emissions, in kg of CO² equivalents per hectare) for a 0.6 m thick compacted soil liner (CSL), GM, and GCL. If a single composite liner system is desired, the carbon footprint of the GM footprint can be added to a CSL or GCL to estimate the carbon footprint for the single composite liner system.