Government conversion factors for company reporting of greenhouse gas emissions
The government conversion factors for greenhouse gas reporting are for use by UK and international organisations to report on certain greenhouse gas emissions.
The UK Government Conversion Factors for greenhouse gas (GHG) reporting are suitable for use by:
- UK-based organisations of all sizes
- international organisations reporting on their UK operations
Therefore the scope of the factors is defined such that it is relevant to Streamlined Energy and Carbon Reporting (SECR) regulations. The factors may also be used for other purposes, but users do this at their own risk.
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.
Annual conversion factor publications
Updates to this page
Last updated 8 July 2024 + show all updates
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Added Greenhouse gas reporting conversion factors 2024
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Complete our user survey about your requirements for the conversion factors.
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Added Greenhouse gas reporting: conversion factors 2023.
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Greenhouse gas reporting: conversion factors 2022 added.
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Greenhouse gas reporting: conversion factors 2021 added.
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Greenhouse gas reporting: conversion factors 2020 added.
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Conversion factors 2019 added.
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Greenhouse gas reporting: conversion factors 2018 published.
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2017 conversion factors published.
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Latest conversion factors for 2016 published
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updated with rest of content from earlier non gov.uk site
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First published.