Fuel Cost Calculator
Calculate litres needed, average consumption and trip fuel cost.
Fuel consumption calculator
Liters, cost per 100 km and trip cost
Related Calculators
Why trust us?
- 100% free calculations
- Current tax rates
- Instant results
- No registration
How fuel consumption is calculated
Enter distance, average l/100 km and price per litre. The calculator returns litres needed, cost per 100 km and total trip fuel cost. Optionally mark a return trip and set passengers to split the fuel bill.
Formula
- Litres = (distance ÷ 100) × consumption
- Trip cost = litres × price per litre
- Cost per 100 km = consumption × price per litre
Worked example
320 km, 6.5 l/100 km, €1.35/l → 20.8 litres; ≈ €8.78 per 100 km; ≈ €28.08 total.
City vs highway
City driving usually burns more fuel than steady highway speeds. Prefer your trip-computer average over brochure figures when planning a real trip.
Data is up to date according to NRA and NOI (Bulgarian tax and social security). For official information see the sources below.
Sources:
- NRA – National Revenue Agency
- NOI – National Social Security Institute
- VAT Act – Bulgarian VAT law
- Local taxes act – Local taxes and fees
Other useful calculators
Helpful trip-planning tools (there is no separate route calculator on this site):
- Days between dates — trip length between departure and return
- Countdown to date — time left until departure day
- Family budget — include transport in monthly spending
Frequently asked questions — fuel cost
How is fuel consumption per 100 km calculated?
Consumption in l/100 km is the litres used to drive 100 kilometres. Example: 40 litres over 500 km → (40 ÷ 500) × 100 = 8 l/100 km. Enter that figure with distance and price per litre in the calculator.
How do I calculate the cost of a trip?
Litres needed = (distance ÷ 100) × consumption. Trip cost = litres × price per litre. For a return trip, distance is doubled first. The tool also shows cost per 100 km for easy comparisons.
How many litres of fuel will I need?
Litres = (km ÷ 100) × l/100 km. Example: 320 km at 6.5 l/100 km → 20.8 litres. Use the quick calculator with your distance and average consumption to see litres instantly.
Why is city consumption higher?
City driving means more stops, starts, and idling. Air conditioning, traffic, and short trips usually raise consumption versus steady highway driving. Prefer the average from your trip computer over brochure figures.
How do I split fuel cost between passengers?
Set the number of passengers in the calculator. Total fuel cost is divided evenly so you see cost per person. This covers fuel only—not vignettes, parking, or other trip expenses.