Greenhouse gas reporting: UK conversion factors 2024

The 2024 Greenhouse gas reporting conversion factors have been released by the UK Government.

These emission conversion factors are for use by UK and international organisations to report on 2024 greenhouse gas emissions.

The link below to the .gov website provides different versions of the conversion factors as below;

  • 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

2024 Key Updates

  • PHEV (Plug In Hybrid Electric Vehicle) utility factor updated to align to real world data, to better reflect the real world emissions from PHEVs.
  • PHEV LGV factors. As the number of PHEV LGVs has increased over the years , conversion factors now include factors for PHEV LGVs.
  • Material factors updated with the latest data. Wood, plastic, and paper factors were updated with the latest data from ecoinvent. Scrap metal and steel cans factors were updated with the latest data from WorldSteel.

All versions are available to download via the .gov website here

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The factors provide the guidance to calculate your business impact or carbon footprint as is widely referenced.

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