Flight carbon footprint

Flight Carbon Offset Calculator

Estimate your flight's CO₂ emissions and how much it costs to offset them — across four verified offset providers. Economy vs business class, return or one-way.

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How It Works

Three steps to calculate your offset.

1

Choose your route

Select from common routes or enter a custom distance in kilometres.

2

Set cabin class & passengers

Business class emits roughly 3× more than economy per passenger due to space and fuel allocation.

3

See offset costs

Compare prices across four verified providers and click through to offset directly.

Carbon Offset Calculator
Emission factor: 0.115 kg CO₂e per km per passenger (economy).

Flight Details

Your Carbon Footprint

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Select a route to calculate
Offset costs

❓ Frequently Asked Questions

What emission factor does this use?
The calculator uses 0.115 kg CO₂e per km per passenger (economy), which accounts for contrail and non-CO₂ warming effects (radiative forcing). Business class applies a 2.9× multiplier to reflect the larger seat footprint and greater fuel allocation per passenger.
Are carbon offsets actually effective?
Well-certified offsets from organisations like Gold Standard and South Pole are generally considered credible. They fund projects that reduce emissions elsewhere — renewable energy, forest protection, and more. The consensus is that offsets are imperfect but better than nothing while aviation decarbonises.
Why does business class emit so much more?
Business class seats take up 3–4× more floor space than economy seats. Since all passengers share the same fuel burn, each business class passenger is allocated a proportionally larger share of total emissions.
What's the difference between the offset providers?
All four providers listed are verified: Gold Standard and South Pole focus on renewable energy and forestry projects worldwide; Terrapass focuses on US-based projects; atmosfair is a non-profit specialising in aviation offsets. Prices vary by project type and certification standard.
Is my data saved?
No — everything runs in your browser. Nothing is sent to any server.

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Ready to calculate your offset?

The Carbon Offset Calculator is free, instant, and takes less than a minute.

Calculate My Offset Browse All Calculators