Work out co2 emissions from electricity instantly with clear inputs, formula shown and shareable results.
Electricity emissions are consumption times grid carbon intensity. 3500 kWh at 210 g/kWh is 735 kg of CO2, equivalent to burning 318 litres of petrol. Intensity varies enormously - under 50 g/kWh in Norway and France, around 200 in the UK and over 700 in coal-dependent grids - so the same appliance has very different footprints by country.
Electricity emissions
CO2(kg) = kWh x intensity(g/kWh) / 1000
Comparison
1 litre of petrol emits 2.31 kg CO2
National grid operators publish it, often in real time. Averages range from under 50 to over 800 g/kWh.
Considerably. Intensity swings by a factor of two or three within a day as wind, solar and gas plant come and go.