Fuel Cost Calculator — Estimate Trip Cost by Distance and MPG
Calculate how much fuel a trip will cost. Supports MPG (US and UK), L/100 km, and km/L, with prices per gallon or liter. Great for road-trip budgeting.
Runs 100% in your browser — nothing is uploaded.
Trip fuel cost
$40.18
Fuel needed
10.71 gal (US)
Cost per mile
$0.13
Liters used
40.56 L
Frequently asked
Which MPG standard should I use?
US gallons and UK (imperial) gallons are different sizes — 1 UK gal ≈ 1.2 US gal. If your car's spec sheet says "40 MPG (UK)" and you're in the US, that's roughly 33 MPG (US). Pick the unit that matches what you're reading.
Does it account for city vs highway driving?
No — the tool uses whatever single efficiency figure you enter. For a realistic estimate, use your car's "combined" rating, or split a mixed trip into two calculations.
What about electric vehicles?
This calculator is for combustion vehicles. For EVs, use kWh/mi (or kWh/100km) and cost per kWh — mathematically the same idea, but the unit dropdowns don't currently list them.
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