CO2 emissions Calculator

Directions: Type the energy value from your bill or records into the left column. Then click anywhere outside the cell you just filled. The answer will appear in the column to the right.

All data in this table is based upon official UK data from the Department of Environment, Food and Rural Affairs, revised March 2001. Emissions for other fuels can be found on DEFRA's Environmental Reporting page.

For electricity generated from renewable sources, zero carbon dioxide emissions may be used if the supply has been certified by OFGEM.

The car mileage figure is based upon an average UK family car returning 29mpg. If you drive a smaller car achieving (say) 40mpg, or regularly share a car, then you could adjust the mileage accordingly to estimate CO₂ emissions.

Aeroplane emissions are very hard to estimate. The figure above is based upon short-haul (European) flights in economy class - add up to 50% for business class travel with lower seat densities. However there is some evidence that there is at least as much Global Warming effect again from other aircraft emissions in the upper atmosphere, such as ozone created from NOx or condensation trails, than solely from the CO2 emitted on the journey.