Fuel Cost Calculator
Distance, efficiency and pump price in: fuel needed, trip cost and cost per kilometer or mile out — metric or imperial, with round trip.
This tool runs entirely in your browser. Your data never leaves your device — it is not uploaded to any server.
How to use
- 1Enter the one-way distance in kilometers or miles.
- 2Add your vehicle's consumption and the current fuel price.
- 3Toggle round trip if needed and read the fuel and cost totals.
Fuel Cost Calculator
Plan any drive before you leave: enter the distance, your car's consumption (L/100 km or MPG) and the current fuel price, and see the liters or gallons required, the total cost and the cost per unit of distance — plus a round-trip toggle that doubles the distance for you.
It works equally well for commuting budgets, splitting a road trip between friends, or comparing a detour's price. The math is local to your browser, so it also works with no signal at the gas station.
Frequently asked questions
How do I convert between L/100 km and MPG?
The two scales are inverses: 235.2 divided by the MPG figure gives L/100 km (US gallons), so 30 MPG ≈ 7.8 L/100 km and 6 L/100 km ≈ 39.2 MPG. The calculator takes whichever figure your dashboard shows.
Why does my real-world fuel use differ from the result?
Official consumption figures assume steady speeds. City traffic, cold starts, roof racks, aggressive acceleration and air conditioning can push real usage 10–30% higher, so treat the estimate as a floor for city-heavy trips.
Does the calculator include tolls or maintenance?
No — it prices the fuel only. For a true cost per kilometer, add tolls and divide wear items (tires, servicing, depreciation) separately; many drivers budget an extra 5–10 cents per km beyond fuel.
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Put this tool on your own site with one line — it runs entirely in the visitor's browser.
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