Flight Carbon Footprint Calculator
Gives a ballpark figure for a flight’s emissions. Change the factor to match a source you trust.
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
The formula
emissions = distance × legs × passengers × emission factor
The factor shares a flight’s emissions among its passengers.
What to watch out for
Government conversion factors and airline reports publish current values. Premium cabins are usually given a higher factor, as they take up more of the aircraft.
Frequently Asked Questions
What does a return flight of 5,570 km each way come to?
About 1,671 kg per passenger at a factor of 0.15 kg per passenger km. That factor is a round placeholder, so use a published one for a firmer figure.
Is there one correct emission factor?
No. It differs from flight to flight and from source to source, and published figures change as they are revised.