How much CO₂ does flying produce?

About 0.15 kg CO₂ per flight kilometre in economy class. For example, a Helsinki–Thailand round trip (roughly 16,000 km) produces around 2.4 tonnes of CO₂ — nearly an entire year's climate budget.

Why does business class pollute more?

A business-class seat takes up 2–3 times more space than an economy seat. Since a flight's emissions are divided among passengers based on the space they occupy, a business traveller's share is larger.

Is it worth replacing short flights with the train?

Yes, environmentally speaking. A train produces a fraction of the emissions of flying. On trips under 1,000 km the train is often competitive in total travel time too, once you factor in getting to and from the airport.

Can flight emissions be offset?

Carbon offsetting (e.g. reforestation or renewable energy) can partly compensate for emissions, but the most effective approach is to fly less. The quality of offsets varies.

Flight Emissions Calculator — CO₂

Calculate your flight's carbon emissions by distance and class. Compare to driving. Free flight CO₂ calculator.

Lentomatka (yhteen suuntaan): 2,000 km

Edestakainen?: Edestakainen

Matkustusluokka: Turisti

0.60 tonnia

Lennon CO₂-päästöt

Päästöt yhteensä	600 kg CO₂
Tonnia CO₂	0.60 t
Vastaa autoilua	5,000 km
Osuus vuosibudjetista (2,5 t)	24 %

ℹ️ Lentopäästöt ovat noin 0,15 kg CO₂ per kilometri turistiluokassa. Business-luokka vie enemmän tilaa, joten päästöt per matkustaja ovat suuremmat. Ilmastotavoite on alle 2,5 t CO₂/henkilö/vuosi.

The flight emissions calculator estimates the carbon dioxide emissions of your trip based on distance and travel class. You get a concrete figure in kilograms and tonnes, plus a comparison with driving and your personal emission budget.

How the calculator works and what it’s for▾

How flight emissions are calculated

The tool multiplies the flight distance by an emission factor, around 0.15 kilograms of CO₂ per kilometre in economy, and accounts for the travel class and whether the trip is a return.

For example, a 2,000 kilometre one-way flight in economy produces about 300 kilograms of CO₂, and a return doubles that amount.

What you enter and what you get

You enter the one-way flight distance in kilometres, indicate whether the trip is a return, and state the travel class.

You get the total emissions in kilograms and tonnes, the equivalent in driving kilometres, and the flight's share of an annual budget of 2.5 tonnes.

Who it is for

The calculator serves travellers who want to understand the climate impact of flying and those considering offsetting. The comparison with driving and rail helps you choose a more environmentally sensible way to travel.