The study provides a review of foreign approaches and basic methodologies for assessing the carbon footprint from individuals and industrial products. The scope of greenhouse gas emissions (1–3) is described taking into account direct, indirect energy and other types, respectively. The article compares digital tools used for assessing the carbon footprint, their advantages, disadvantages, principles of the methodologies used and the range of source data. The key functions, requirements and scope of application for the analogue of the digital carbon footprint assessment tool are determined.