Emissions Calculators

Recommended Calculators for Collaborative Projects

• EPA's Retrofit Calculator (widely applicable for add-on controls). The Retrofit Calculator is a custom application that will allow anyone to characterize a fleet and calculate the tons of emission reductions a retrofit project will generate.
• EPA's SmartWay Transportation Partnership's FLEET Performance Model (for trucks only). The Freight Logistics Environmental and Energy Tracking Performance Model (FLEET Performance Model) allows a company to quantify the environmental performance of their fleet operations.
• EPA’s Biodiesel Calculator (for biodiesel only). Designed to compare diesel fuel oil modified with 0 to 100% biologically derived oils.
  

Other Calculator Information of Interest

• The Diesel Emissions Quantifier (Quantifier) is a tool to help fleet owners, school districts, municipalities, contractors, port authorities, and others estimate cost effectiveness and environmental impact of emission reduction technologies that have been added to vehicles and equipment.  Estimates are made using specific information about a fleet, such as miles driven, fuel mileage, and others.  This site will also help you to prepare and submit your diesel emissions data to EPA.
• National Biodiesel Board emissions calculator. It gives a general idea of emissions reductions as a percentage and in lbs based on the amount of fuel used and the percent BD blend.
• The British Columbia Biofleet Project's Biodiesel Calculator
• Argonne National Laboratory's GREET Model. The GREET (Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation) Model calculates fuel-cycle energy consumption, greenhouse gas emissions, and five criteria pollutants in different transportation fuel/technology combinations. Developed by Argonne National Laboratory as a Microsoft Excel spreadsheet model, it allows researchers to evaluate various engine and fuel combinations. GREET is in the public domain and is available free of charge. For a given vehicle and fuel system, GREET separately calculates the
  following:
  • Consumption of total energy (energy in non-renewable and renewable sources), fossil fuels (petroleum, natural gas, and coal), and petroleum
  • Emissions of CO2-equivalent greenhouse gases - primarily carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O)
  • Emissions of five criteria pollutants: volatile organic compounds (VOCs), carbon monoxide (CO), nitrogen oxide (NOx), particulate matter with size smaller than 10 micron (PM10), and sulfur oxides (SOx)
• EPA's Biodiesel Emissions Program
• DOE's Custom Alternative Fuels Comparison Chart
• PM Calculator will calculate controlled emissions for filterable PM2.5 and filterable PM10 for point sources only.
• Pace E-CALC'99 Emissions Calculator. Pace is a tool to calculate gasoline emissions such as VOCs, Toxics and NOx based on fuel properties.
• EPA's School Bus Emissions Calculator
• MOBILE6 Vehicle Emission Modeling Software. MOBILE6 is an emission factor model for predicting gram per mile emissions of Hydrocarbons (HC), Carbon Monoxide (CO), Nitrogen Oxides (NOx), Carbon Dioxide (CO2), Particulate Matter (PM), and toxics from cars, trucks, and motorcycles under various conditions.
• California Air Resources Board (CARB) Emissions Inventory Data
• EPA's AirData: Access to Air Pollution Data. The AirData Web site gives you access to air pollution data for the entire United States. Want to know the highest ozone level measured in your state last year? Ever wonder where air pollution monitoring sites are located? Are there sources of air pollution in your town? You can find out here!    AirData produces reports and maps of air pollution data based on criteria that you specify.