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Emission Factors

This page outlines the emission factor databases used by the GreenFeet calculators. Our calculators utilize the latest internationally published emission factor databases.

What are Emission Factors?

An emission factor is a coefficient which allows you to transform your activity data into actual Green House Gas emissions. Essentially, it is the average emission rate of a given source, which is relative to the units of activity, or process.

An emission factor is a representative value that attempts to relate the quantity of a pollutant released to the atmosphere with an activity associated with the release of that pollutant. Acting as a key conversion coefficient, it transforms raw activity data—such as litres of fuel consumed, kilowatt-hours of electricity used, or miles driven—into an estimated, standardized amount of greenhouse gas emissions. These factors allow organisations to estimate their carbon footprint by multiplying the activity data by the corresponding factor, bridging the gap between operational activities and environmental impact. They are crucial for creating consistency in sustainability reporting, regulatory compliance, and identifying emission hotspots within a supply chain.

Below is a list of Emission Factor Categories that are utilized and available in the GreenFeet calculators;

  • Fuels : Gaseous, Liquid, or Solid ( Combustion )
  • Bio-Energy; Bio-Mass, Bio-Fuel, or Bio-Gas ( Combustion )
  • Passenger Vehicles: Cars ( Either by size or market segment ), Motorbikes ( Size only )
  • Delivery Vehicles; Vans ( Class I, II, or III ), Heavy Goods Vehicles ( Rigid or Articulated)
  • Electric Vehicles; Cars or Vans ( Either Plug-in Hybrid Electric or Battery Electric Vehicle )
  • Electricity Emissions; Specific international emissions factors can be found below in our sources list
  • Material Use; Construction, Organic, Electrical Items, Metal, Plastic, Paper, and Other
  • Waste Disposal; Construction, Refuse, Electrical Items, Metal, Plastic, Paper, and Other
  • Air Travel; Short vs. Long Haul, Domestic or International
  • Freighting Goods; Vans, HGV ( Refrigerated ), Freight Flights, Rail, Sea Tanker, or Cargo Ship

Where Can I Find Emission Factors?

  • All of the emission factors used in our calculations can be found here at GreenFeet! All of our sources are located just below, and they are updated as soon as possible to provide the most up to date and accurate information. Furthermore, there is an abundance of sources required to compute our emission factors due to different international conversions. This is because simply just not a single emission factors encompasses all regions, which is true for a variety of emission factors.

  • These different sources span across various websites throughout the internet, but our technicians here at GreenFeet brought all of them to your finger tips! The sources that were used to generate your calculations can be found just below!

  • You can also access the Emission Factors from the Add Records and click View Emission Factors Documentation.

Add Record:

Sources for Emission Factors


Updated 24 days ago