Calculators
Flight Emissions Calculator
Estimate flight CO2e emissions from distance, cabin class, trip type, and passengers locally in your browser.
Enter the one-way flight distance, cabin class, trip type, and number of passengers. Uses a per-passenger emission factor of 0.15 kg/km for short flights (up to 1500 km), 0.12 kg/km for medium flights, and 0.11 kg/km for long flights, scaled by cabin class. This is a planning estimate, not an airline or offset quote. The calculation runs locally in your browser; your values are not uploaded or stored.
Find a flight emissions estimate without uploading anything.
Enter the one-way flight distance in kilometres or miles, the cabin class, whether the trip is one-way or round-trip, and the number of passengers to see the estimated total and per-passenger CO2e with the formula shown. Everything runs locally in your browser, so your values are not uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
What does the flight emissions calculator show?
Enter the one-way flight distance, cabin class, trip type, and number of passengers. The calculator returns the estimated total CO2e in kilograms and tonnes plus the per-passenger result with the calculation shown. For example, a 5000 km one-way economy flight for 1 passenger gives about 550 kg CO2e.
Which formula does the flight emissions calculator use?
It uses total CO2e = one-way distance in km times a per-passenger factor (0.15 kg/km up to 1500 km, 0.12 kg/km up to 3500 km, 0.11 kg/km above that) times a cabin multiplier (1.0 economy, 1.3 premium, 1.5 business, 2.0 first) times 2 for round-trips times the passenger count. Miles are converted at 1.609344 km per mile.
Which inputs are accepted?
Enter a one-way distance greater than zero through 25000 km (15534 miles), a cabin class, a trip type, and a whole number of passengers from 1 to 500. Missing values, non-numeric text, and values outside these ranges show a clear error instead of a result.
Do my travel details stay private?
Yes. The calculation and copy action run locally in your browser. CodeASystem does not upload or store the values you enter.