Trip planner
Plan the full cost of a road trip — fuel and tolls combined, split per passenger, with an estimate of the carbon dioxide produced.
How the trip is costed
Fuel cost comes from the distance, your mileage, and the price; tolls are added on top. With round trip on, both distance and toll count twice. The carbon estimate multiplies the litres used by the emission factor for your fuel, and the total is divided by passengers for a per-person figure.
FAQs about the trip planner
What does the trip planner work out?
It adds up the fuel cost and tolls for your journey, splits the total per passenger, and estimates the carbon dioxide produced — all from the distance, your mileage, and the fuel price.
How is the CO₂ estimate calculated?
It multiplies the litres of fuel used by the emission factor for that fuel — about 2.31 kg of CO₂ per litre of petrol, 2.68 per litre of diesel, and 2.78 per kg of CNG.
How do I find the toll amount?
Check a route map or toll lookup for your highway and enter the total one-way toll. With round trip on, the toll is counted both ways automatically.
How does the per-person cost work?
The combined fuel and toll cost is divided by the number of passengers, which is handy for splitting a shared road trip fairly.
Can I use it for a bike or CNG car?
Yes. Choose the fuel type, enter the matching efficiency and price, and the cost and emissions adjust accordingly.
How accurate are the figures?
They are close estimates. Real fuel use, tolls, and emissions vary with traffic, route, and driving style, so treat the totals as a reliable guide rather than an exact bill.