According to various embodiments, an emissions calculation system calculates the emissions resulting from transporting a shipment that includes an individual or group of packages. In certain embodiments, the calculated emissions are based on estimated amounts of fuel used in the transportation process based on historical fuel usage and shipment data. In addition, various embodiments of the system generate and display (or otherwise make available) one or more reports of the calculated emissions information. For example, the reports may provide a total amount of carbon dioxide emitted for a particular shipment or group of shipments. In addition, the report may provide a breakdown of the amount of emissions resulting from various operational activities in the transportation process (e.g., resulting from pickup, delivery, and/or transportation between carrier facilities, and resulting from stationary operational activities, such as sorting or movement within each carrier facility).