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Travel Carbon Footprint Calculator

Compare the CO₂ emissions, cost and time of flying, taking the train, driving or the bus for your journey — and see the greenest option.

Enter Your Values

Using shared profile · 3,500/mo · EUR — edit on Dashboard

Start from a realistic scenario
Journey
km
people
Annual
4 /yr
152

Results update automatically as you change values.

Decision Engine
Understand
Enter only what matters
Calculate
Transparent formulas
Compare
Side-by-side options
Hidden Costs
What you might forget
Scenarios
Best, expected, worst
Decide
Clear recommendation
Decision Verdict
Best overall choice
Bus

Flying this route emits about 1094 kg CO₂ for your party.

Flight CO₂ (per trip)
1,094 kg CO₂
Bus CO₂ (per trip)
86 kg CO₂
Lowest-emission option
6 things you might be forgettingEstimate based on your inputs — not guaranteed financial advice.

Decision Engine

Strong verdict
100/ 100
Decision confidence
Bus

Clear winner — Bus comes out well ahead.

How the options score
Bus Pick100
Wins on: CO₂ per Trip, Est. Cost
Car77
Train49
Flight21
Your action plan
  1. 1Lean towards Bus — it scores best on the factors that matter here.
  2. 2Pin down "One-Way Distance" — it moves the result by up to 6,772 kg CO₂, more than anything else.
  3. 3Budget for the 6 hidden costs before you commit.
  4. 4Sanity-check the worst case (544 kg CO₂) — can you live with it?
  5. 5Adjust the inputs to match your real numbers, then revisit the verdict.

Your Results

Styled PDF reports — Pro
Flight CO₂ (per trip)
1,094 kg CO₂
Bus CO₂ (per trip)
86 kg CO₂
Lowest-emission option
CO₂ Saved vs Flying
1,008 kg CO₂
Annual CO₂ if Flying
4,378 kg CO₂
Offset Cost (flying)
€109
Total Distance
1,600
Decision Summary

Travelling 1600 km (return) by air emits about 1094 kg CO₂ for 2 traveler(s). The greenest option, the bus, emits only 86 kg — saving 1008 kg per trip while costing around €256 and taking 20.0 hours. Over 4 trips a year, choosing it instead of flying would cut 4.03 tonnes of CO₂. Note that aviation's true climate impact is roughly 2-3x the raw CO₂ figure.

What-If Scenarios

Results update instantly
800 km
50 km5000 km
4 /yr
1 /yr52 /yr

Cost Breakdown

Flight (est. cost)
€38426.7%
Train (est. cost)
€48033.3%
Car (est. cost)
€32022.2%
Bus (est. cost)
€25617.8%

CO₂ Emissions by Mode (per trip)

€0€500€1.0K€1.5KFlightTrainCarBusFlight: €1,094Train: €112Car: €272Bus: €86.40

Click chart to expand

Estimated Cost by Mode

€0€200€400€600FlightTrainCarBusFlight: €384Train: €480Car: €320Bus: €256

Click chart to expand

Side-by-Side Comparison

Flight
CO₂ per Trip
1,094 kg CO₂
Est. Cost
€384
Travel Time
5.3 h
CO₂ vs Flight
0% less
Train
CO₂ per Trip
112 kg CO₂
Est. Cost
€480
Travel Time
13.3 h
CO₂ vs Flight
90% less
Car
CO₂ per Trip
272 kg CO₂
Est. Cost
€320
Travel Time
17.8 h
CO₂ vs Flight
75% less
RecommendedBus
CO₂ per Trip
86 kg CO₂
Est. Cost
€256
Travel Time
20.0 h
CO₂ vs Flight
92% less
Best Financially
Bus
Best for Flexibility
Car
Best Overall
Bus

Flying this route emits about 1094 kg CO₂ for your party. The bus emits just 86 kg — a saving of 1008 kg (92%) per trip. The cheapest option is the bus at roughly €256. The trade-off is time: the bus takes about 20.0 hours versus 5.3 for flying.

What You Might Be Forgetting

Hidden costs and factors that are easy to overlook but can significantly impact your decision.

Radiative Forcing

Your flight figure of 1094 kg already includes aviation's non-CO₂ warming effects (contrails, altitude), applied at ~1.9x the raw CO₂. This is the fairer number for comparing against ground transport.

Cabin Class

Business class can emit 2-3x more CO₂ per passenger than economy because premium seats occupy far more of the aircraft. Economy is the low-carbon choice.

Airport Access Emissions

Getting to and from airports (often far from city centres) adds emissions and time that train stations, usually central, do not.

Offset Quality

Carbon offsets vary hugely in quality. Offsetting your annual flying (€109) helps only if the credits are genuine and additional — reducing emissions is far more reliable than offsetting them.

Car Occupancy

A full car (2 people) is far greener per person than a solo drive. At 2 occupant(s) your car emits 136 kg per person; solo it would be 272 kg.

Cumulative Annual Impact

Taken 4 times a year, flying this route adds 4.38 tonnes CO₂/year. Switching to the bus would cut that to 0.35 tonnes.

Est. annual
€109

These estimates are for informational purposes only and do not constitute financial advice. Actual results may vary based on factors not captured in this calculator.

How This Calculator Works

What this calculator does

This calculator compares the carbon emissions, estimated cost and travel time of flying, taking the train, driving or the bus for your journey, and highlights the lowest-emission option.

How the calculation works

We multiply your distance by standard emission factors per passenger-kilometre for each mode (adjusting car emissions for how many people share the vehicle), then compare CO₂, cost and time side by side and estimate the cost of offsetting the emissions.

Formula

CO₂ = Distance × Emission Factor × Travelers
Car CO₂ = Distance × Car Factor × Cars Needed (occupancy shared)
Offset Cost = (Annual CO₂ in tonnes) × Offset Price

Example

800 km round trip (1,600 km) for 2 people: flying ≈ 576 kg CO₂, train ≈ 112 kg, a shared car ≈ 272 kg. The train saves ~464 kg per trip versus flying.

How to Use This Calculator

  1. 1
    Enter your numbers

    Fill in the inputs for Travel Carbon Footprint. Defaults are realistic starting points — replace them with your actual figures.

  2. 2
    Understand the calculation

    We multiply your distance by standard emission factors per passenger-kilometre for each mode (adjusting car emissions for how many people share the vehicle), then compare CO₂, cost and time side by side and estimate the cost of offsetting the emissions.

  3. 3
    Review results and scenarios

    Check metrics, cost breakdown, comparison tables, and best / expected / worst scenarios. Use sliders to stress-test assumptions.

  4. 4
    Decide with the verdict

    Read the decision engine recommendation and FAQ. Example: 800 km round trip (1,600 km) for 2 people: flying ≈ 576 kg CO₂, train ≈ 112 kg, a shared car ≈ 272 kg. The train saves ~464 kg per trip versus flying.

Factors to Consider

  • Aviation's real impact is ~2-3x its raw CO₂ (contrails, altitude)
  • A full car is far greener per person than driving solo
  • Trains are usually the lowest-carbon option for medium distances
  • Offsets vary in quality — reducing emissions is more reliable
  • Airport access adds time and emissions flights hide

Common Mistakes

  • Comparing only ticket price, not carbon or total time
  • Ignoring aviation radiative forcing
  • Assuming driving is always worse than flying
  • Treating all carbon offsets as equivalent
  • Forgetting car occupancy dramatically changes per-person emissions

Frequently Asked Questions

Is flying really worse than driving?+

Per passenger-km, short-haul flights are among the highest-emitting options, especially once altitude effects are included. A full car or, better, a train is usually far greener.

Are carbon offsets worth buying?+

Offsets can help but vary hugely in quality and permanence. They are a supplement to — not a substitute for — reducing emissions by choosing lower-carbon travel.

What is the greenest way to travel?+

For most medium-distance journeys, trains are the lowest-carbon option, followed by buses and full cars. Flying and solo driving are typically the highest.

This calculator provides estimates for informational purposes only and does not constitute financial, investment, tax, or legal advice. Always consult a qualified professional before making important financial decisions.

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