Litres per hundred kilometres
Official fuel economy provides a reference, but city driving, motorway speed, hills and driving style change real consumption. A trip estimate improves when the vehicle’s observed average is used.
Free tools
Automobile
Automobile calculators are useful when a journey needs a budget or a fair comparison. A car rated at 5.8 L/100 km will not cost the same at every pump price, distance, load or road type. This category focuses on litres needed, trip cost, cost per kilometre and differences between vehicles. Fuel tools help plan travel, split expenses, follow a price rise or decide whether a detour is worth paying for. They are practical for commuters who want to see how fuel price changes affect the same weekly route.
Pump price and route length
The final fuel bill combines kilometres driven, litres used and price per litre. A small price change can matter over a holiday route or a daily commute. The same route can then be compared after a change in pump price.
Sharing journey expenses
When passengers split a trip, fuel should be separated from tolls, parking and wear. Fuel alone may not represent the whole cost of the journey.
Comparing two cars
A more efficient vehicle offsets a higher purchase price only when annual mileage is high enough. Cost per kilometre brings consumption back to real use.
Planning a long drive
A long trip may require several refuelling stops at different prices. Estimating consumption before departure keeps the transport budget from being underestimated.
Frequently asked questions
Why is my real fuel use higher than the official figure?
Official tests follow a standard cycle. Traffic, speed, air conditioning, tyres, load and hills can all raise everyday consumption.
How is trip fuel cost calculated?
Multiply distance by fuel use in L/100 km, divide by 100, then multiply by the litre price. Tolls and vehicle wear are not included in that fuel-only figure.
Is cost per kilometre enough to choose a car?
It helps compare usage costs, but insurance, maintenance, depreciation, tyres and purchase price are also part of the total budget.