See how much CO2 you emit on a drive, and how to calculate it yourself, based on fuel type, consumption and distance.
Emissions are calculated by multiplying the number of liters used by an emissions factor for the fuel type:
Driving 100 km with a gasoline car using 6 liters per 100 km gives emissions of 6 × 2.31 ≈ 13.9 kg CO2.
Diesel has a higher carbon content and energy density per liter than gasoline, which gives higher CO2 emissions per liter burned — even though diesel cars often have lower fuel consumption per liter than comparable gasoline cars.
Tank-to-wheel only counts the emissions from combustion in the car itself. Well-to-wheel also includes emissions from extraction, refining and transport of the fuel, giving a higher total figure.
Smoother driving, correct tire pressure, less unnecessary load and shorter idling all reduce consumption and thus emissions. In the longer term, switching to an EV or public transit gives the biggest cuts.
A gasoline car using 6 liters per 100 km emits roughly 14 kg CO2 per 100 km, while a comparable diesel car emits roughly 16 kg. Use the calculator above with your own consumption and distance for an exact figure.