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Utility Calculators

Flight Carbon Footprint Calculator

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
km
Verified formula Private

CO₂ emissions

300.0

Trees to offset (per year)
14.3

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Flight Carbon Footprint Calculator

The Flight Carbon Footprint Calculator works out your co₂ emissions, along with 1 related figure in an instant. Enter flight distance and number of passengers and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the flight distance.
  2. Enter the number of passengers.
  3. Read off your co₂ emissions, together with trees to offset (per year) — the calculator updates automatically, with no button to press.

Formula

The Flight Carbon Footprint Calculator uses the formula:

CO₂ emissions = Flight distance × 0.15 × Number of passengers

Worked example

For example, with flight distance of 2,000 km and number of passengers of 1, the co₂ emissions is 300.0.

Inputs used
Flight distance 2,000 km
Number of passengers 1
Results
CO₂ emissions 300.0
Trees to offset (per year) 14.3

Results are estimates for educational use, not professional advice.

Frequently asked questions

Using about 0.15 kg of CO₂ per passenger-kilometre, a 2,000 km flight emits roughly 300 kg per passenger.

The plane's emissions are shared across everyone on board, so the footprint is measured per passenger-kilometre.

A mature tree absorbs about 21 kg of CO₂ a year, so the calculator divides emissions by 21 to estimate trees needed.

Fly less often, choose direct flights, travel economy, and consider trains for shorter trips or verified carbon offsets.

The Flight Carbon Footprint Calculator uses the formula: CO₂ emissions = Flight distance × 0.15 × Number of passengers. For example, with flight distance of 2,000 km and number of passengers of 1, the co₂ emissions is 300.0.

Enter the flight distance. Enter the number of passengers. Read off your co₂ emissions, together with trees to offset (per year) — the calculator updates automatically, with no button to press.

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