Free tool · Fuel

Carrying fuel burns fuel. How much, over a year?

Every kilogram loaded above what the flight needs makes the aircraft heavier, and a heavier aircraft burns more. Put in your own numbers to see what that adds up to.

Fuel on board at landing above your planned reserves.
Typically 2.5 to 4.5% depending on type and stage length. Your flight-planning system has the exact figure.
An example. Use your own contract price.

Nothing you type here is sent anywhere. The sums run in your browser.

Fuel burned to carry the extra, per year
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Cost per year
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CO₂ per year
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Every 100 kg less per flight saves
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Fleet Intelligence for this fleet, per year
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Read it carefully

Not all of this is waste

Some extra fuel is the right call: weather at destination, a busy terminal area, or fuel that is cheaper at the departure airport than at the next one. The calculator shows what carrying the extra costs. It can't tell you how much of it was needed.

That is the question Fleet Intelligence answers. It compares what each flight carried and burned with what it should have, given its route, weight, time and season, and separates the extra that had a reason from the extra that is habit.

The sum

How it's worked out

Extra burn per flight = extra fuel carried × carry cost × flight time. Multiplied by flights per day, 365 days and the number of aircraft.

CO₂ uses 3.16 kg of CO₂ per kilogram of jet fuel, the factor used in international aviation emissions reporting.