Fuel cost calculator
Fuel needed and trip cost from distance, consumption and fuel price.
Enter your values and press Calculate. Your inputs stay in the address, so you can switch language or share the link.
Formula
fuel = distance × consumption ÷ 100 cost = fuel × price per litre
How it works
Fuel used = distance × consumption per 100 km ÷ 100. Multiply by the price per litre for the cost of the trip.
Worked example
The same calculation with the default values:
- Distance 450 km
- Fuel consumption 7.5 L/100 km
- Fuel price per litre 1.2
- fuel = 450 × 7.5 ÷ 100 = 33.75 L
- cost = 33.75 × 1.2 = 40.5
- cost per km = 40.5 ÷ 450 = 0.09
Result: Fuel needed: 33.75 L · Trip cost: 40.50 USD · Cost per kilometre: 0.09 USD
Uses the fuel consumption figure entered (liters per 100 km) as a constant average - real consumption varies with driving style, terrain, load, and traffic, so the actual cost of a specific trip can differ from this estimate.
Common mistakes
- Using a consumption figure in miles per gallon directly in a field that expects liters per 100 km - these are different units measuring efficiency in opposite directions (higher L/100km is worse, higher mpg is better), and must be converted, not entered as-is.
- Forgetting that consumption on the highway, in the city, and towing a load can differ substantially - a single average figure applied to every trip type will over- or under-estimate specific journeys.
- Using an outdated fuel price - prices change frequently, so an old price entered here will skew the cost estimate away from what will actually be paid at the pump.
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