GREET and AFLEET Model Guide

GREET 2020 Release

The Argonne National Laboratory’s Systems Assessment Center is pleased to announce the 2020 release of the suite of GREET Models. Please read Summary of Expansions and Updates in GREET® 2020 (554KB pdf) for more details on updates in this version.

GREET Excel Model: 

  • Fuel-Cycle Model: To download GREET_1_2020 please use the following link GREET 1 Series
  • Vehicle-Cycle Model: To download GREET_2_2020 please use the following link GREET 2 Series


The Department of Energy’s Clean Cities Program has enlisted the expertise of Argonne to develop a tool to examine both the environmental and economic costs and benefits of alternative fuel and advanced vehicles. Argonne has developed the Alternative Fuel Life-Cycle Environmental and Economic Transportation (AFLEET) Tool for Clean Cities stakeholders to estimate petroleum use, greenhouse gas emissions, air pollutant emissions, and cost of ownership of light-duty and heavy-duty vehicles using simple spreadsheet inputs.

The tool uses data from Argonne’s Greenhouse gases, Regulated Emissions, and Energy use in Technologies (GREET) fuel-cycle model to generate necessary well-to-wheels petroleum use and GHG emission co-efficients for key fuel production pathways and vehicle types. In addition, Environmental Protection Agency’s MOtor Vehicle Emission Simulator (MOVES) and certification data are used to estimate tailpipe air pollutant emissions. Various sources are used to provide default cost data, including the Clean Cities Alternative Fuel Price Report and American Recovery and Reinvestment Act awards.

Download tool and documentation