Log & Offset Your Flights

Start by entering your flight information including Roundtrip, Departure, Arrival, Number of Tickets and Cabin Class. All of your flights and the CO2 to offset per flight are stored in your flight log below.

If you want to find out more about our methodology click here

Your Flights

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Our Methodology

The Formula
To calculate the emissions of 1 individual person on the flight we use the following formula: (distance * fuel consumption * emissions/kg * RFI * footprint by cabin class * passenger to cargo ratio) / (number of seats on the plane * plane load factor).
There are a lot of aircrafts to choose from so to narrow it down we used two of the most popular planes for short-haul and long-haul flights.
-A320neo for short-haul
-A350 for long-haul

The use of fuel depends greatly on external factors, however our research showed that on average each aircraft used burned the following:
-The A320neo uses around 2.3kg/km
-The A350 uses 8.9kg/km

Emissions per Kg
According to the IATA every kg of fuel burned during flight releases 3.15kg of CO2.

After calculating the flight distance we adjust it using the ICAO best practice:
-If the distance is less than 550km we add 50km
-If the distance is 550km-5500km we add 100km
-If the distance is more than 5500km we add 125km

Passenger to Cargo Ratio
Since a plane doesn't only carry passengers, we also have to account for the passenger to cargo ratio. According to the ICAO the average is is 0.85.


As you want to offset your ticket and not the entire plane, the number of seats on each aircraft are important to take into account. Our research showed that:
-The A320neo has an average of 155 seats
-The A350 has an average of 380 seats

Passenger Load
The ICAO estimates airplane passenger load to be 0.8.


Travel Class
Since the seats in different classes are of different sizes, more passengers can for example fit into economy than first class we have to factor in a multiplicator. According to the World Bank Footprints by travel class, relative to the footprint of an average passenger, assuming Load Factors of 0.40 for First Class, 0.60 for Business Class, and 0.80 for Economy Class are:
-Economy (0.82)
-Business (2.07)
-First Class (4.79)

Radiative Forcing Index
The Radiative Forcing Index is extremely difficult to account for and ensures that we take into account other externalities of flying such as such as the release of NOx & sulphure. The World Bank estimates an average RFI of 2.7.

Short vs. Long-haul
We classify short haul flights as less than 3000km and long haul as more than 3000km.

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