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How are aircraft CO2 emissions calculated?

Aircraft CO2 emissions are an exact multiple of fuel consumption.


To calculate fuel consumption there are two different approaches for aviation (Method A and Method B).

CO2 emissions are then calculated by multiplying the mass of fuel by the emission factor:
EMISSIONS = Fuel Consumption (in tonnes) × Emission Factor (in CO2 kilograms per tonne of fuel) 
 
Type of fuel Emission factor (tCO2/tFuel)
Aviation Gasoline (AvGas) 3.10
Jet gasoline (Jet B) 3.10
Jet kerosene (Jet A1 or Jet A) 3.15
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