Flight Emissions Calculator

Separate a user-factor base flight CO₂ scenario from an optional non-CO₂/radiative-forcing scenario.

Inputs and method

Base CO₂ = passenger distance × entered emissions factor × cabin multiplier. Optional scenario = base CO₂ × entered RF multiplier.

All empirical factors, rates, percentages, clearances, product yields, and model values shown as inputs are scenario values supplied by you. Their source or measurement basis appears beside the inputs and result. Units remain visible, calculations use unrounded values, and rounding occurs only for display or a whole-package ceiling.

Interpreting the result

Factors, cabin treatment, geography, year, and RF choice must come from the selected source. Results are not an exact footprint and include no car/tree equivalents.

Treat scenario ranges as sensitivity ranges, not confidence intervals. Check the factor’s version, geography, population or product, system boundary, and date before using the result. A finite arithmetic result does not establish code compliance, certification, safety, forecast accuracy, or model validity.

Validation and rounding

The calculator rejects blank required factors, invalid numeric values, prohibited negatives, impossible relationships, and unsupported modes. No malformed value silently selects another branch. Continuous outputs use the precision displayed in the result; package quantities round up only after waste is applied.

Worked example

For 1,000 passenger-km, 0.12 kg CO₂/passenger-km, and cabin multiplier 1, base CO₂ is 120 kg. An RF multiplier of 1.7 gives 204 kg CO₂e; 0 gives a zero optional scenario without changing base CO₂.

Frequently asked question

What does “none” mean for RF? Enter 0 and identify that choice in the RF source field; base CO₂ remains separate.

Sources

• IPCC, “AR6 Working Group I: The Physical Science Basis” — 2021 report landing page; Summary and report-scope passages, accessed 2026-07-09. Route-specific boundary: context and terminology only; it does not supply an entered coefficient, uncertainty, recommendation, or approval.
• U.S. EPA, “Greenhouse Gas Emissions from a Typical Passenger Vehicle” — current web edition; calculation-boundary explanation, accessed 2026-07-09. Route-specific boundary: context and terminology only; it does not supply an entered coefficient, uncertainty, recommendation, or approval.