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Flight CO2 Emissions Calculator

Aviation accounts for around 2–3% of global CO2 emissions. This calculator helps you quickly estimate the carbon footprint of your flight based on distance, travel class and number of passengers. Enter the distance in km, select your class and the number of travellers to see emissions per person, total emissions and the number of trees needed to offset your flight.

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How to use the flight CO2 calculator?

1. Enter the flight distance in kilometres. You can find this on your airline's website or Google Maps. 2. Select your travel class: economy, business or first. 3. Enter the number of passengers (1–10). 4. The calculator instantly shows CO2 per person, total CO2 for the group and the number of trees needed to offset the emissions.

Example calculation

A Warsaw–New York flight is about 7,500 km. In economy class, emissions are 7,500 × 0.133 = 997.5 kg CO2 per person. For 2 passengers, total emissions are 1,995 kg CO2, requiring ⌈1,995 / 22⌉ = 91 trees to offset over one year.

Frequently asked questions

How is flight carbon footprint calculated?

The carbon footprint is calculated as flight distance multiplied by the emission factor for the chosen class: economy 0.133 kg CO2/km, business 0.319 kg CO2/km, first 0.532 kg CO2/km.

Why does business class emit more CO2 than economy?

Business class seats take up more space on the plane, so each passenger is allocated a larger share of the fuel burned, resulting in higher CO2 emissions per person.

How many trees are needed to offset a flight?

One tree absorbs approximately 22 kg of CO2 per year. The calculator divides total emissions by 22 and rounds up to the nearest whole number.

No — the calculator only covers direct CO2 emissions. The full climate impact of aviation is higher due to the Radiative Forcing Index (RFI).

Choose economy class, direct flights and modern aircraft. You can also voluntarily offset your emissions by purchasing certified carbon credits.

Yes, proportionally — take-off and landing phases consume a lot of fuel. The calculator uses an averaged factor for all distances.

The calculator supports 1 to 10 passengers travelling in the same class.

Results are approximate. Actual emissions depend on aircraft type, load factor and route. The calculator uses standard factors applied by climate organisations.

Carbon offsetting means funding projects that absorb or reduce greenhouse gas emissions — such as tree planting or renewable energy — to neutralise your carbon footprint.

You can check the distance on your airline's website, Google Maps or dedicated aviation services. Enter the result in km into the calculator.

Results are indicative and based on average emission factors. Actual emissions may vary depending on aircraft type, route and flight conditions.

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