Trip Cost & CO₂ Calculator
Compare fuel and electric trips and see how much you save by carpooling to events
Trip Details
km
L/100km
€/L
2people
Cost Breakdown
Cost Per Person
€9.38
Round trip
Total Cost
€18.75
Fuel Used
15.0L
Environmental Impact
CO₂ Saved by Carpooling
17.3 kg
By sharing your ride with 1 other people, you're preventing 17.3kg of CO₂ from entering the atmosphere.
Tip: Average fuel consumption for most cars is between 6–9 L/100km. Check your car's specifications for the exact value.
Trip cost and CO₂ calculator — questions
How the calculator works, which emission factors it uses, and what to enter for both fuel and electric cars.
How accurate is the calculator?
The calculator uses the distance, consumption, and price you enter, so output accuracy depends on your inputs. The fuel CO₂ estimate uses 2.31 kg CO₂ per litre of petrol (the standard European combustion factor); the electric CO₂ estimate uses 0.380 kg CO₂ per kWh (the German grid mix in 2024 per UBA).
Which emission factor does ecoTriver use?
For platform ride-level CO₂ accounting, ecoTriver uses the UBA 2024 TREMOD factor — 0.164 kg CO₂ per km per average German passenger car. This calculator uses energy-based factors (per litre of petrol or per kWh of electricity) because it is a pre-ride estimate rather than a ride record.
Does the calculator account for round trips?
Yes. You enter distance one-way and the calculator doubles it automatically, matching how ride CO₂ is calculated on the platform — both legs of a return trip count.
What fuel consumption value should I enter?
Check your car's manual or onboard computer. Most modern petrol passenger cars sit between 6 and 9 L/100 km. Diesel is usually 10–15% lower, hybrids roughly 3–5 L/100 km, and plug-in hybrids vary widely by charge state.
What energy consumption value should I enter for an EV?
Most modern EVs consume between 14 and 20 kWh per 100 km. Smaller cars like the Renault Zoe or Fiat 500e are at the lower end (~14–16 kWh/100km), mid-size BEVs like the VW ID.3 or Tesla Model 3 sit around 16–18, and SUVs or older models reach 20+. Your onboard computer shows the average — use that.
How is electric CO₂ calculated?
Energy used (kWh) × grid CO₂ intensity. We use 380 g CO₂ per kWh, the German public electricity mix average for 2024 (UBA Strommix). If you charge from your own solar panels or a green-electricity tariff, your real CO₂ is much lower; if you charge in a country with more coal in the grid mix, it will be higher.
Are charging losses included?
No. The calculator uses energy delivered to the wheels (vehicle consumption), not energy drawn from the wall. Real-world AC charging adds ~10% losses, DC fast charging slightly more. For a quick comparison this is sufficient — the gap between fuel and electric is wide enough that charging losses don't change the conclusion.