Calculate flight emissions including the radiative forcing uplift.
Aviation emissions are roughly doubled by non-CO2 effects at altitude, which is what the radiative forcing multiplier captures. Cabin class matters because a business seat occupies about three times an economy seat’s floor area. Flying business class rather than economy roughly triples the footprint of the same journey, which is the single largest discretionary choice a traveller makes.
Flight Carbon Footprint
Emissions = distance × base factor × cabin multiplier × radiative forcing multiplier
Emissions = distance × base factor × cabin multiplier × radiative forcing multiplier Aviation emissions are roughly doubled by non-CO2 effects at altitude, which is what the radiative forcing multiplier captures. Cabin class matters because a business seat occupies about three times an economy seat’s floor area.
Flying business class rather than economy roughly triples the footprint of the same journey, which is the single largest discretionary choice a traveller makes.
This calculator takes 5 inputs: Flight distance each way, Return flight, Cabin class, Radiative forcing multiplier, Offset price per tonne. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.