Calculate flight emissions by cabin class

Estimate one passenger’s flight emissions by route band and cabin class, with the uncertain non-CO2 aviation effect shown separately.

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ToolFlight Emissions Calculator
Input
Output
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How it works

One-way great-circle kilometres are doubled for a return ticket and multiplied by the selected UK Government 2026 passenger-kilometre factors. Separate factors produce totals excluding and including radiative forcing, and both already contain the methodology’s 8% distance uplift for indirect routing, delay, and circling.

Formula
kg CO2e = passenger-km × selected 2026 factor
  • Domestic, short-haul, long-haul, and cabin-class choices use the published table rows rather than distance thresholds or generic multipliers.
  • No route type, cabin, or return status is assumed because each changes the result.

Worked example

A 1200km return flight in economy
Input
											Distance km: 1200
Journey type: short-economy
Return trip: true
Output
												Haul type: short haul
Distance flown km: 2400
Co2e kg no rf: 178.44
Co2e kg with rf: 301.82
Co2e tonnes with rf: 0.302
Factor no rf: 0.07435
Factor with rf: 0.12576

When to use this

Business-travel expenses record route and cabin, Scope 3 inventories aggregate passenger-kilometres, and journey comparisons place economy flights beside rail or road alternatives.

Edge cases

  • A 1,200 km journey is not automatically short-haul because UK domestic and international bands are not separated by one kilometre threshold; select the actual route band.
  • Domestic business and first class are not offered because the 2026 table supplies only an average domestic seating factor.
  • The radiative-forcing total remains separate from direct greenhouse gases because the methodology identifies uncertainty around contrails, water vapour, and nitrogen oxides.

References