How do you calculate emissions from flights?


The combustion of 1 kg of jet fuel in an aircraft engine produces 3.157 kg of carbon dioxide (CO2). However, the volume released per flight is based on a number of factors, such as aircraft efficiency and maintenance, distance travelled, the load carried (passengers and cargo) and weather conditions.

Although there are several methods to calculate carbon emissions from a flight, airlines participating in the IATA carbon offset program use a methodology based on the one developed by the United Nation’s International Civil Aviation Organization (ICAO).

IATA has developed this concept further by creating a tool that allows airlines to use their own verified data on fuel burn, passenger and cargo weights, seat configurations and load factors. This tool generates the most accurate calculation of CO2 emissions per passenger yet developed.



Note: All values are the averages across all flights and aircraft types for the city pair flown.

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