Research and analysis

Greenhouse gas reporting: conversion factors 2023

These emission conversion factors are for use by UK and international organisations to report on 2023 greenhouse gas emissions.

• From: Department for Energy Security and Net Zero
• Published: 7 June 2023
• Last updated: 28 June 2023 — See all updates

Documents

Conversion factors 2023: condensed set (for most users) - updated 28 June 2023

MS Excel Spreadsheet, 1.8 MB

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Conversion factors 2023: full set (for advanced users) - updated 28 June 2023

MS Excel Spreadsheet, 1.99 MB

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Conversion factors 2023: flat file (for automatic processing only) - updated 28 June 2023

MS Excel Spreadsheet, 500 KB

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Conversion factors 2023: methodology

PDF, 1.55 MB, 153 pages

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Conversion factors 2023: major changes

PDF, 303 KB, 17 pages

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Conversion factors 2023: statement of voluntary compliance with the Code of Practice for Statistics

PDF, 173 KB, 3 pages

Details

Update: June 2023

Due to a minor error in the version published earlier this month, we have updated a small number of factors for Passenger Vehicles in the advanced set, condensed set, and flat file spreadsheets. These are the factors for cars (by size), using unknown fuels or plug-in hybrid EVs. Further details are in the relevant conversion factors spreadsheets.

There are 3 sets of conversion factors:

• condensed set: this abridged version of the full set is easiest to navigate and most frequently requested. Recommended for most, and new, users of conversion factors
• full set: contains all available factors for the selected year. Recommended for advanced users only due to the volume of information
• flat file set (only available from 2014): contains same data as the full set but designed for use in automated processes. Not recommended for most users

The methodology paper explains how the conversion factors are derived.

New users: read the introductory worksheet in the latest condensed set of conversion factors, and the guidance at the top of each individual worksheet.

Regular users: read the ‘what’s new’ sheet which highlights the significant changes for that update: this will ensure consistent and comparable reporting year-on-year.

Defra’s Environmental reporting guidelines provide more detail.

Published 7 June 2023
Last updated 28 June 2023 + show all updates

1. 28 June 2023

   Due to a minor error in the version published earlier this month, we have updated a small number of factors for Passenger Vehicles in the advanced set, condensed set, and flat file spreadsheets. These are the factors for cars (by size), using unknown fuels or plug-in hybrid EVs. Further details are in the relevant conversion factors spreadsheets.

2. 7 June 2023

   First published.