The government conversion factors for greenhouse gas reporting are for use by UK and international organisations to report on greenhouse gas emissions.
In order to report the greenhouse gas emissions associated with an organisation’s activities, the carbon emissions need to be converted into ‘activity data’ such as:
- Distance travelled
- Litres of fuel used
- Tonnes of waste disposed
The conversion factor spreadsheets provide the values to be used for such conversions, and step by step guidance on how to use them.
We produce a new set of conversion factors each year, together with a methodology paper explaining how the conversion factors are derived, and a paper explaining the major changes in the latest year’s factors.
For more information, please visit: Government conversion factors for company reporting of greenhouse gas emissions – GOV.UK (www.gov.uk)



