Flight CO2 and CO2e calculator
Compare route fuel, combustion CO2, non-CO2 uplift, SAF scenarios, contrail sensitivity and cabin allocation.
Guide hub
Aircraft Fuel Burn, Efficiency and Emissions
Aircraft fuel use depends on the airframe, payload, route length, winds and flight phase. Per-seat efficiency adds cabin configuration, while climate impact adds non-CO2 effects and assumptions about sustainable aviation fuel.
One model across the map and dashboard
Great Circle Pro builds trip fuel from taxi, climb, cruise and descent terms, then applies a damped long-range weight correction. The same aircraft tables power the map and the standalone emissions dashboard.
Fuel and efficiency guides
Most fuel-efficient aircraft
See the relationship between range and fuel burn per seat across airliners and business jets.
The Breguet effect
Why fuel carried for later in the flight increases fuel burned earlier in the mission.
Fuel and emissions methodology
Phase fuel, wind-adjusted time, load factor, step-climb credit and CO2 conversion assumptions.
Important distinctions
Trip fuel and block fuel
Block fuel includes ground and flight phases. Cruise-only rates cannot describe taxi, climb and descent accurately.
CO2 and CO2e
Combustion CO2 follows fuel burned. CO2e adds a planning uplift for warming effects aloft and depends on the selected methodology.
Aircraft and per-seat efficiency
A larger aircraft may burn more total fuel but less per occupied seat. Load factor and cabin layout materially change the comparison.
SAF scenarios
A SAF blend changes lifecycle assumptions, not the amount of fuel the aircraft must carry for the modeled flight.
These estimates are designed for transparent comparison and education. They are not operator fuel plans, verified emissions inventories or lifecycle certification results.
Compare a route by aircraft
Enter a city pair and review flight time, fuel, CO2 and payload-range context.