Before a road trip or long commute, you can budget fuel from distance, fuel economy, and pump price. Everything runs locally in your browser.
Two economy formats
With L/100 km: liters ≈ km × (L/100 km) ÷ 100, then × price per liter. With US MPG: US gallons = miles ÷ MPG, then × price per gallon. Results also show liters and gallons for cross-checking.
What to enter
Use one-way or round-trip distance in km or miles. Economy can be dashboard average or handbook combined cycle—add margin for traffic, A/C, and load. Price should match what you pay at the pump (per liter or per US gallon).
Related tools
To convert L/100 km ↔ MPG without money, use the fuel economy converter. More everyday tools on the everyday hub.
Reading results
Estimated cost excludes tolls, parking, and electric miles on hybrids. Split total cost by passengers for per-person share.
Frequently asked questions
How is trip fuel cost estimated?
With L/100 km: fuel ≈ distance × (L/100 km) / 100 × price per liter. With US MPG: gallons = miles ÷ MPG, cost = gallons × price per gallon.
Different from the fuel economy converter?
The fuel economy tool converts L/100 km ↔ MPG; this page estimates money for a trip from distance and pump price.
8 L/100 km for 400 km—how much fuel?
400 km × 8 ÷ 100 = 32 liters. Enter 400 km, 8 L/100 km, and your price for total cost.
Can I mix miles and kilometers?
Yes—pick km or mi for distance and L/100 km or US MPG for economy; conversions use standard factors.
How accurate is the result?
Good for budgeting. Traffic, A/C, and load raise real consumption—leave margin.
Round-trip distance?
Enter total miles/km for the whole trip once—do not enter one-way and mentally double unless you want one-way cost only.
Hybrids or EVs?
Hybrids: use recent gasoline economy; ignore electric miles or use other travel-cost tools—this page is fuel-only.
More everyday calculators?
Tips, GPA, unit price, download time, and more on the everyday hub.
Can I save my inputs?
Yes. Copy link below the form keeps your current inputs so you can share the scenario or save it for later.