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How to use
Estimate fuel required and trip cost from distance, vehicle efficiency and fuel price. The tool supports kilometers or miles, L/100 km, km/L and US MPG, plus round trips and optional cost splitting.
- Enter the one-way distance and choose km or miles.
- Enter vehicle efficiency and its unit, then fuel price per liter or US gallon.
- Choose one way or round trip, enter the number sharing the cost, and calculate.
How it is calculated
Example
Example: 500 km at 7 L/100 km with fuel priced at 2.18 per liter uses about 35 liters and costs 76.30 one way. Selecting round trip doubles the distance, fuel and estimated cost.
Important notes
This is a planning estimate, not an actual receipt. Real consumption changes with traffic, speed, load, weather, tire pressure and terrain. MPG uses the US gallon only; US-gallon prices are converted using 3.785411784 liters. Tolls, parking and non-fuel costs are excluded.
Worked examples and interpreting results
A 300 km trip at 8 L/100 km uses 24 L. At a hypothetical price of 2.5 per liter, cost is 60 and each of three travelers pays 20.
| Case | Calculation | Result |
|---|---|---|
| Fuel used | 300 × 8 ÷ 100 | 24 L |
| Total cost | 24 × 2.5 | 60 |
How to check the result
Select km, L/100 km, price per liter and one-way. Round-trip mode doubles entered distance, so do not also enter a doubled distance.
Frequently asked questions
What is the difference between L/100 km and km/L?
L/100 km measures fuel used per distance, where lower is better; km/L measures distance per liter, where higher is better.
Is MPG US or Imperial?
This calculator uses US MPG only so the gallon definition is unambiguous.
Does cost per person include all trip expenses?
No. It divides only the estimated fuel cost.