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We hope you will enjoy the RenSMART site. If you like what we are doing, please take a moment to look at our Kickstarter project. We are trying to launch a service to help everyone in the UK to reduce their carbon footprint. If it is successful, we plan to roll it out to other world regions.

UK CO2(eq) emissions due to electricity generation

In our calculations, we convert kWh to kg of carbon released based on Greenhouse gas reporting: conversion factors from Department for Business, Energy and Industrial Strategy. The conversion factor is {{KWHToCO2.CO2_PER_KWH}} kg CO2 saved for each kWh produced from a carbon free source. The factor is based on the carbon emissions generated by the current UK power stations per kWh generated. This factor includes other green house gasses such as methane and nitrous oxide which are converted to their carbon dioxide equivalents so the value is really kg CO2 eq. per kWh.

Carbon Emissions Calculator

Carbon dioxide (and equivalent gasses) emited by the generation of electricity from the UK grid

Enter kWh or select an activity.



For further information, feel free to email us at

We now are able to give a live estimate of CO2 emissions due to electricity production in the UK and the corresponding kg of CO2 per kWh. Live UK Generarion The estimate is based on a live feed from the National Grid breakdown of current generation sources. We can also provide a forecast for the UK's generation UK Daily Generation Forecast which is also available as a user firendly clock Economy GREEN Clock

CO2(eq) emissions due to electricity generation (Other European Countries)

This data is from 2016 and supplied by The European Environment Agency

The CO2 emission intensity (kg CO2/kWh) is calculated as the ratio of CO2 emissions from public electricity production (as a share of CO2 emissions from public electricity and heat production related to electricity production), and gross electricity production.

Country kg CO2 per kWh
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CO2(eq) emissions due to electricity generation (by source)

This data is from The Parlimentary Office of Technology document Carbon Footprint OF Electricity Generation. The CO2 emission intensity (kg CO2/kWh) is derived from both the operational emissions from the generation source and the emissions generated during the generating sources construction. We use this data to calculate our live CO2 emission intensity board.

Generation Source kg CO2 per kWh
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