The results and personal calculation algorithm were developed based on the Global Footprint Network's Consumption Land Use Matrix (https://www.footprintnetwork.org/licenses/) and derived from National Footprint Accounts (http://data.footprintnetwork.org), the most widely used source of Ecological Footprint data.
Underlying data, theory, and concepts are consistent with the Ecological Footprint Calculator (http://www.footprintcalculator.org/) although questions and results may vary.
Supplemental background reference data for the calculations is based on average consumption patterns for middle- and high- income countries and average lifetime Ecological Footprint for product categories.