Carbon Emissions Calculator

ICAO Carbon Emissions Calculator

ICAO has developed a methodology to calculate
 the carbon dioxide emissions from air travel for use in offset programmes.

The ICAO Carbon Emissions Calculator allows passengers to estimate the emissions attributed to their air travel. It is simple to use and requires only a limited amount of information from the user.

The methodology applies the best publicly available industry data to account for various factors such as aircraft types, route specific data, passenger load factors and cargo carried.

For additional information, please Contact us or refer FAQ or see the accompanying
methodology to the ICAO Carbon E​missions Calculator.

​ICAO has developed a new Application Programming Interface (API) for the ICAO Carbon Emissions Calculator that allows its automatic integration with software, webpages, or mobile applications released by third party organizations.

For more information on the ICEC API, please contact The pricing grid for the use of the ICEC API is available here. ICEC API Terms and Conditions.

Try the ICEC API Demo (100 calls) per the following steps:

  • go to this link: ICEC API DEMO;
  • create an account as per the steps on pages 3-8 of the End User Guide;
  • ensure to select and subscribe to the ICEC DEMO icon;
  • once the subscription is approved, generate a key as per pages 8-11;
  • ensure to select to try out the /carbonemission (not /un/carbonemission).

Summary of the methodology used:

CO2 Emissions per passenger take into consideration the load factor and are based only on passenger operations (i.e. fuel burn associated with belly freight is not considered). The steps for the estimation of CO2 emissions per passenger:

Step 1: Estimation of the aircraft fuel burn


Step 2: Calculation of the passengers' fuel burn based on a passenger/freight factor which is derived from RTK data


Step 3: Calculation of seats occupied (assumption: all aircraft are entirely configured with economic seats). Seat occupied = Total seats * Load Factor


Step 4: CO2 emissions per passenger = (Passengers' fuel burn * 3.16) / Seat occupied

Note: for flights above 3000 km, CO2 emissions per passenger in premium cabin = 2 x CO2 emissions per passenger in economy

You can find your carbon footprint by entering your city of origin and destination.
If you have trouble viewing the Carbon Calculator, please click here.
Share this page: