Calculating your carbon footprint – 2020 conversion factors released

News – Friday, June 12th, 2020

Carbon conversion factors for 2020 have recently been released by the Department for Business, Energy & Industrial Strategy (BEIS). Find the highlights below. The methodology for determining carbon dioxide equivalents (CO2e) remains the same year on year except where changes are outlined.


As the main UK electricity grid continues to decarbonise with the increase in use of renewable sources, the carbon factor has decreased again this year by 8.79%.

Year on year percentage change in carbon conversion factor (Kg Co2e)

  • 2011  – 0.45205
  • 2012  – 0.46002 (2% increase)
  • 2013 –  0.44548 (3% decrease)
  • 2014 –  0.49426 (11% increase)
  • 2015 –  0.46219 (6.5% decrease)
  • 2016 – 0.41205 (10.84% decrease)
  • 2017 – 0.35156 (14.68% decrease)
  • 2018 – 0.28307 (19.48% decrease)
  • 2019 – 0.2556 (9.70% decrease)
  • 2020 – 0.23314 (8.79% decrease)


Main changes and additions

The methodology has been amended for the calculation of emission factors for both traditional and electric cars due to a change in the regulatory testing. This has resulted slight decrease in factor.

Factors for biodiesel have been aligned to National Atmospheric Emissions Inventory methodologies. This has resulted in a substantial increase (around 420%) compared to 2019 factors.

Waste oil and lubricants properties are now included.

Additional factors included to assist Streamlined Energy and Carbon Reporting (SECR)
SECR reporting came into place since 1 April 2019 with obligations differing between quoted ad quoted businesses covering Scope 1, Scope 2 and Scope 3 emissions. Factors within the BEIS document can be used to report energy use and emissions from activities for which the company is responsible. Additional factors have been included to cover transport where companies may have two types of data (by fuel consumption or journey distance) which they can use to calculate vehicle emissions (cars, vans and HGVs owned or controlled by the company).

Factors have been revised and increased due to an improvement of data.


Find more detail on methodology and the factors on the BEIS website.

If you are an organisation in or outside of Camden and would like assistance with your calculating your carbon footprint get in touch:

Reporting your organisation’s environmental performance can lower costs, improve understanding of exposure to climate change risks and demonstrates leadership and green credentials in the marketplace. The CCCA operate a FREE Carbon Certification scheme for organisations who report their annual energy data to us, for more information on the scheme go to our webpages