Driving Carbon Footprint Calculator
Estimates the CO₂ from a drive using the fuel it burns.
Rough CO₂ emissions
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Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
Per person —
Grams per kilometre — g/km
Fuel used —
Reading this —
The formula
fuel = distance ÷ economy emissions = fuel × emission factor
Burning a litre of fuel gives more than a kilogram of CO₂ because most of the mass of the CO₂ is oxygen taken from the air.
What to watch out for
For diesel, change the factor to the diesel figure. For an electric car this does not apply, as the emissions depend on how your electricity is made.
Frequently Asked Questions
How much CO₂ does a 500 km drive produce?
At 7 L/100 km and 2.35 kg per litre, about 82 kg. Shared between two people, that is 41 kg each.
How much CO₂ does a litre of petrol produce?
About 2.35 kg when burned, and about 2.69 kg for diesel, from the US EPA’s per-gallon figures.