UK Greenhouse Gas Reporting: Conversion Factors 2018

UK Greenhouse gas reporting: conversion factors 2018

The United Kingdom Department for Business, Energy and Industrial Strategy (BEIS) has published its Greenhouse Conversion Factors 2018, which are set at Version 01.00.

These emission conversion factors can be used to report on 2018 Greenhouse Gas emissions by UK-based organisations of all sizes, and for international organisations reporting on UK operations.

The Department provides three sets of conversion factors, namely:

Condensed set:
This data set is the most popular version. It provides an abridged version of the full set of factors, designed to reduce the volume of information users have to navigate through to find the factors they want. It is recommended for most, and new, users of conversion factors. Download here

Full set:
This data set of factors contains all of the available factors for the selected year, and is recommended for advanced users only due to the volume of information presented. Download here

Flat file set:
This data set contains the same information as the full set, but arranged for automated processes – available from 2014 onwards. It is not recommended for most users.
A methodology paper explaining how the conversion factors are derived will be published later in July 2018 to support this data set. Download here


The following advice is given for New or Previous Users:

New Users:
It is advised that new users of the conversion factors should download the condensed set of conversion factors from the latest available year (2018). Please read the guidance in the document’s introductory sheet then follow the informative text at the top of each conversion factor tab in the output files.

Previous Users:
For repeat users of the conversion factors, please download your preferred factor set and read the ‘what’s new’ sheet before using the conversion factors. This sheet highlights the most significant changes to the conversion factors made in this update. Following the ‘what’s new’ guidance will ensure that reporting is consistent and comparable year-on-year.


Please note that all the data sets for 2018 are timed to expire on 31 July 2019, when a new data set for that year (2019) will be published.


  1. Review whether your business has a compliance obligation or wishes to voluntarily report on its Greenhouse Gas (GHG) emissions in the year 2018.
  2. Download the relevant data set; Condensed Set recommended for New Users or the Full Set for Advanced or Repeat Users.
  3. Apply the relevant GHG Conversion Factors in relation to your reporting using the 2018 Data Set until 31 July 2019 at the latest
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