Carbon reporting – 2016 conversion factors released

News – Wednesday, June 22nd, 2016

This month DECC released carbon conversion factors for 2016, read on for a brief background and the main changes.

Reporting benefits

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. Investors, shareholders and other stakeholders are increasingly requesting better environmental disclosures in annual reports and accounts.

Legal obligations

The Companies Act 2006 requires listed companies to report on greenhouse gas (GHG) emissions for which they are responsible as well as on environmental matters within their Annual Report. Organisations that fall under the CRC Energy Efficiency Scheme are required to monitor their energy use, and report their energy supplies annually.


GHG conversion factors are used in calculating the amount of GHG emissions from energy consuming activities. They are measured in units of kg carbon dioxide equivalent (kg CO2e).The GHG Protocol defines emissions as scope 1, 2 or 3 depending on their source:

Scope 1 All direct GHG emissions.
Scope 2 Indirect GHG emissions from consumption of purchased electricity, heat or steam.
Scope 3 Other indirect emissions (e.g. transmission and distribution, waste disposal)


Factors are reviewed annually for a number of reasons:

  • Emissions recording accuracy improves.
  • National electricity factors will change from year to year. Electricity factors change when the fuel mix consumed in UK power stations (and auto-generators) fluctuate and the proportion of net imported electricity changes. These annual changes can be large as the factor depends heavily on the prices of coal and natural gas as well as fluctuations in peak demand and the implementation of new renewable energy generation.
  • Refining of fuels and the technologies of engines that burn them (ie automobile efficiencies) will improve on a yearly basis to keep up with regulation and better competition.


The example below shows the changes in the UK electricity generation factor over recent years:


Conversion factor

Kg CO2e

Percentage change









2014 0.49426


2015 0.46219


What’s new for 2016?

  • A 10.8% drop in UK electricity generation factor compared to 2015. This is due to a significant decrease in coal generation and an increase in gas and renewables generation in 2014 (the inventory year for which the 2016 GHG Conversion Factor was derived).
  • All overseas national electricity factors have been removed from the DECC publication – these are now available through the International Energy Agency
  • Slight decrease in the Transmission & Distribution (UK Electricity) factor
  • Increase in the Diesel (average biofuel blend) factor

Some common factors for 2016 are below:


Conversion factor Kg CO2e

Electricity Generated (UK)


Transmission & Distribution (UK Electricity)


Diesel (average biofuel blend)


Find the full list and explanatory notes here

Which version of factors should I use?

Factors should be used that correlate with the data being reported (e.g. factors for 2016 should be used for data from calendar year 2016). If you are reporting on an April to March year, the factors from the calendar year in which the greatest portion of your data falls should be applied (e.g. 2016 factors should be applied to data in 01/04/16 – 31/03/17, 2015 factors should be applied to data in reporting year 01/04/15 – 31/03/16.

Members of Camden Climate Change Alliance report annually based on their financial year of energy use to establish the carbon footprint for organisations in the borough and can access our Carbon Tracker Tool in our online Resource Library. We’re currently drawing together data from the 2015/16 year. As a premium member we will calculate a basic scope 1 and 2 annual carbon footprint for this year only and provide some analysis based on the granularity of the information provided.

If you have never conducted a carbon footprint, we can also conduct a historical footprint that will establish a baseline, reporting boundary, and assessment of your yearly data. Please contact us for more information.

If you are a business in or outside of Camden and would like assistance get in touch:

Or attend our Carbon Footprinting Event on 14th July – register through Eventbrite