Flight carbon footprint

Type km, class, base g/km and RFI. 2000, 1, 90 and 1.9 give 342.0 kg CO₂. 800, 1, 90 and 1.9 give 136.8 kg CO₂. 3500, 1.5, 90 and 2 give 945.0 kg CO₂. A model, not a ticket.

Four fields. 2000 km, class 1, base 90 and RFI 1.9 give 342.0 kg CO₂. Not a ticket.

Input data

Results

Enter data and click Calculate.

How it works

Flight carbon footprint in this calculator is kg CO₂ from four fields. 2000 km, class 1, base 90 g/km and RFI 1.9 give 342.0 kg CO₂. 800, 1, 90 and 1.9 give 136.8 kg CO₂. 3500, 1.5, 90 and 2 give 945.0 kg CO₂. The unit is kg CO₂, not CO₂e.

Class and RFI have a floor of 0.5. The base is grams per km, not an airline per-passenger factor. Result = km × base × class × RFI / 1000. The calculator does not read IATA or an offset shop.

342.0 kg CO₂ is not a ticket. 136.8 kg CO₂ is the shorter 800 km. 945.0 kg CO₂ is 3500 km at class 1.5 and RFI 2.

Multimodal commute next door counts a year of car and rail. Remote work counts avoided km. Here the flight stays: 2000, 1, 90 and 1.9 stay 342.0 kg CO₂.

Type 2000, 1, 90 and 1.9, then Calculate. A comma in 1.9 parses. A four-number sketch, not an airline.

2000, 1, 90 and 1.9 give 342.0 kg CO₂. 800, 1, 90 and 1.9 give 136.8 kg CO₂. 3500, 1.5, 90 and 2 give 945.0 kg CO₂. Another RFI at 2000 changes 342.0.

Formula

kg CO₂ = km × base_g_per_km × class × RFI / 1000. Class and RFI do not go below 0.5.

How to use

  1. Type distance 2000 km and class 1.
  2. Type base 90 g/km and RFI 1.9.
  3. Click Calculate. The result is 342.0 kg CO₂.
  4. 800, 1, 90 and 1.9 give 136.8 kg CO₂. 3500, 1.5, 90 and 2 give 945.0 kg CO₂.
  5. Four fields, not a ticket and not an offset.

2000 × 90 × 1 × 1.9 / 1000 = 342.0 kg CO₂

Four fields. 2000 km, class 1, base 90 and RFI 1.9 give 342.0 kg CO₂. Not a ticket.

Flight
Distance in km. 2000 at 90, 1 and 1.9 leave 342.0 kg CO₂. 800 leaves 136.8.
carbon
The unit is kg CO₂, not CO₂e. 2000, 1, 90 and 1.9 stay 342.0 kg CO₂.
RFI
The multiplier. 1.9 at 2000 stays inside 342.0 kg CO₂. 2 at 3500 and class 1.5 gives 945.0.

Examples

Example 1

  • 2000 km
  • class 1
  • base 90 g/km
  • RFI 1.9

342.0 kg CO₂

What flight carbon footprint from 2000 km, class 1, base 90 and RFI 1.9? 342.0 kg CO₂. A model, not a ticket.

Example 2

  • 800 km
  • class 1
  • base 90
  • RFI 1.9

136.8 kg CO₂

What footprint from 800 km? 136.8 kg CO₂.

Example 3

  • 3500 km
  • class 1.5
  • base 90
  • RFI 2

945.0 kg CO₂

What footprint from 3500 km, class 1.5 and RFI 2? 945.0 kg CO₂.

Related calculators

Multimodal commute

A yearly commute footprint when you mix car, rail, bus, and bike.

Use calculator →

Remote work CO₂

Car CO₂ you skip when a few workdays stay at home.

Use calculator →

All ecology calculators

Common questions

What footprint from 2000 km, class 1, base 90 and RFI 1.9?

342.0 kg CO₂. km × 90 × 1 × 1.9 / 1000. Not a ticket.

How much at 800 km?

136.8 kg CO₂. The same 90 and 1.9, a shorter distance.

How much at 3500 km, class 1.5 and RFI 2?

945.0 kg CO₂. 3500 × 90 × 1.5 × 2 / 1000.

Is 342.0 kg CO₂ an offset?

No. Four typed fields. A shop and IATA sit outside this calculator.

Is the result CO₂e?

No. The unit is kg CO₂. RFI is a multiplier, not a second unit.

What if class is blank?

The code lifts class and RFI to 0.5. A blank does not multiply by 0.

Does a comma in 1.9 work?

Yes. 1,9 and 1.9 are the same RFI.

How is this different from commute?

That card uses a year and mode shares. Here one flight leg and RFI.

Is this a ticket?

No. A result from km and a base. The airline does not enter.

Knowledge sources

The factors on the page are a sketch. Below are EPA emissions terms, not a national inventory.

Page updated in 2026.