The online carbon footprint calculation tools enable you to calculate your personal or business carbon footprint.
Methodology for the online carbon calculators
The online calculators on this web site follow the methodology outlined in Defra's Voluntary Reporting Guidelines, and uses the most up to date emission factors (currently using 2013 Government Conversion Factors for Company Reporting Methodology). The only exceptions to this are some country specific factors (which are sourced for international sources such as the World Resource Institute’s Greenhouse Gas protocol), and the Individual's Secondary Footprint calculations (which are based on estimates developed by Carbon Footprint Ltd).
The calculator uses emissions factors which take account of all greenhouse gases (i.e. CO2, N2O, methane etc.) released by the activities, with the results presented in units of metric tonnes of CO2 equivalent (CO2e). In most cases that means the results will be slightly higher than if calculating CO2 only.
The calculations of emissions from fuels are Scope 1, meaning the direct GHG emissions from the combustion of the fuels. The calculations do not include the Well to Tank (WTT) Scope 3 Emissions associated with extraction, refining, distribution, storage and retail of the fuels.
To complete your carbon footprint calculation, enter data from your business (or lifestyle) over the last 12 months (or time period of your choice). i.e. if you are calculating your car travel emissions then enter the total distance you have travelled over the past 12 months.
The following sections below give further information on how to use the calculator and answers to frequently asked questions.
Why do we need to select the country where I live?
This enables a more accurate calculation of your emissions from electricity usage, as the factor depends on how the electricity is generated in the region (e.g. from Coal, Gas, Nuclear, Renewables etc.).
The country selection also allows you to compare your results with the average for your country. Country averages in the Results Tab were sourced from the US Environmental Protection Agency (EPA).
What consumption period should I use?
Carbon footprint calculations are typically based on annual emissions from the previous 12 months, however you are able to select a more suitable time period (e.g. a month) if you so desire.
House Tab / Buildings Tab
What number do I put into number per household to calculate an individual’s carbon footprint?
Select the actual number of people occupying the household in order to calculate your own personal proportion of the total household carbon footprint. Your individual footprint is calculated by dividing the total amount of energy by the number of people in your house.
If you want to calculate the full household’s footprint, then select 1 in the section.