Three numbers — how far you’re driving, how much your car drinks per 100 km, and what a litre costs — and you get the trip’s fuel bill, the cost of every kilometre, and each person’s share if you’re splitting. Tick “round trip” to double the distance automatically. Both 6.5 and 6,5 work as input.
Fill in the three fields to see the trip cost.
How it works
The math is straightforward: litres = distance × consumption ÷ 100, and cost = litres × price. A 400 km drive in a car that uses 7 l/100 km burns 28 litres; at 199 per litre that is 5 572. The calculator just saves you from doing it on the back of a receipt — and from the classic mistake of forgetting the return leg.
The consumption figure is the honest lever here. Manufacturer numbers are measured in lab conditions; real-world consumption is typically 10–20% higher, more with a full car, a roof box, or mountain roads. If you know your actual average from the trip computer or from full-tank refills, use that.
The result carries no currency symbol on purpose: enter the price per litre in dinars, euros or anything else, and the total comes out in the same unit. Cost per person divides the total equally — the usual arrangement when friends share a ride.
Practical examples
Belgrade to Budva by car
Around 450 km one way. A diesel using 6 l/100 km at 205 per litre: 27 litres ≈ 5 535 one way, about 11 070 for the round trip. Split among 4 people, under 2 800 each — hard to beat by bus.
Is the daily commute worth it?
22 km to work, round trip, 21 working days: enter 462 km. A petrol car at 8 l/100 km and 195 per litre costs about 7 207 per month in fuel alone — a useful number when comparing with a monthly transit pass.
Splitting a festival ride
Four friends, 320 km round trip, 7.5 l/100 km, 199 per litre: total 4 776, so 1 194 each. Copy the result into the group chat and nobody argues about the math.
Comparing two cars for the same trip
Run the calculation twice: the 5 l/100 km hatchback versus the 9 l/100 km SUV over 600 km is 5 970 versus 10 746 at 199 per litre. The difference often pays for the hotel night.
Frequently asked questions
How do I find my car’s real fuel consumption?
The most accurate way: fill the tank completely, reset the trip counter, drive normally, refill completely and divide litres refilled by kilometres driven, times 100. Trip computers are convenient but often 5–10% optimistic.
Can I type the consumption with a decimal comma, like 6,5?
Yes. Both 6,5 and 6.5 are accepted in every field, and results are formatted using your language’s number conventions.
What currency does the calculator use?
None — it deliberately has no currency symbol. Whatever unit you type as the price per litre (dinars, euros, marks) is the unit the result comes out in.
Does “round trip” just double everything?
It doubles the distance, which doubles litres and cost. If your return route is different in length, leave it unticked and enter the total kilometres yourself.
How is cost per person calculated?
Total cost divided equally by the number of people. It intentionally ignores who owns the car — if you want the driver to pay less, negotiate that part yourselves.
Why is my real trip more expensive than the calculation?
The calculator covers fuel only. Tolls, parking and the extra consumption from air conditioning, roof loads or mountain climbs are not included. For a realistic budget, add tolls separately — on Serbian highways they are a significant share.
Does the calculation work for electric cars?
Mechanically yes, with substitution: enter kWh/100 km as “consumption” and price per kWh as “price per litre”. The math is identical; only the units change. A dedicated EV version with charging losses is on the roadmap.
How accurate are manufacturer consumption figures?
WLTP figures are measured in standardized lab cycles. Real-world driving is usually 10–20% thirstier, and short winter city trips can be 30% above the brochure. Use your own measured average whenever you have one.
Should I calculate with highway or combined consumption?
For a mostly-highway trip at steady 110–130 km/h, use your highway figure — often lower than city consumption for petrol cars. For mixed routes, the combined average is the safer estimate.
Is anything I enter uploaded or stored?
No. Every calculation runs in your browser; the page makes no network requests with your data and remembers nothing after you close it.
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