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Conversion factors

Conversion factors guide to help you calculate your organisation’s carbon emissions - with guidance on how to convert energy use and carbon emissions into common units. 

Conversion factors: convert your energy bill units into carbon emissions

This guide has been updated to use UK Government 2016 conversion factors.

Greenhouse gas (GHG) conversion factors are used to calculate the amount of greenhouse gas emissions caused by energy use. They are measured in units of kg carbon dioxide equivalent**. In order to convert 'energy consumed in kWh' to 'kg of carbon dioxide equivalent', the energy use should be multiplied by a conversion factor.

Conversion factors example

To convert from litres of petrol to kgCO2e emissions multiply by 2.331, so for example:

200 litres petrol = 200 x 2.331 = 466.2 kgCO2e

Carbon emissions are usually quoted in kgCO2/kWh. If you wish to convert the carbon dioxide factors into carbon (ie kgC/kWh), multiply the figure by 12 and divide by 44.

Conversion factor guide

Please contact us on +44 (0)20 7170 7000 or email info@carbontrust.com if you have any problems with ordering online.  If you don't receive the PDF guide by email please check your spam folder.

If you are a current Carbon Trust customer please contact us for your free copy of the publication.

 

Further information

Find out more about our carbon footprinting measurement services and footprint certification for your organisation.

For further guidance on conversion factors, see the UK Government website.

Conversion factors 2016 - digital download

Purchase your digital copy of the guide (PDF format) & linked interactive spreadsheet (.xlsx). This version of the guide, published November 2016, includes UK government 2016 conversion factors.

Price: £9.99

Conversion factors 2015 - digital download

Purchase your digital copy of the guide (PDF format) & linked interactive spreadsheet (.xlsx). This version of the guide, published November 2015, includes UK government 2015 conversion factors.

Price: £9.99

Please contact us on +44 (0)20 7170 7000 or email info@carbontrust.com if you have any problems with ordering online.  If you don't receive the PDF guide by email please check your spam folder.

If you are a current Carbon Trust customer please contact us for your free copy of the publication.

 

Further information

Find out more about our carbon footprinting measurement services and footprint certification for your organisation.

For further guidance on conversion factors, see the UK Government website.

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