Fuel Cost Calculator

AAA's annual ownership cost studies find that fuel typically accounts for 15–25% of total vehicle cost, with depreciation, insurance, maintenance, financing, registration, and taxes making up the rest. The IRS standard mileage rate (currently around 67 cents per mile) is a reasonable estimate of the all-in cost of driving — fuel cost alone is usually 10–20 cents per mile.

When evaluating whether a trip is 'worth it' financially, fuel-only calculations understate the real cost meaningfully. For long trips that wear the vehicle, accelerate maintenance schedules, and depreciate the asset, the IRS-standard rate is a more honest estimate. For one-off trips with already-paid fixed costs, fuel cost is a reasonable approximation of marginal cost.

A 200-mile freeway route at 70 mph and 30 MPG costs about $23 in fuel at $3.50/gallon. A 220-mile two-lane route at 50 mph and 35 MPG costs about $22. The shorter freeway route is typically faster but the back-road route is sometimes cheaper despite the extra distance — particularly when the freeway alternative pushes the car into low-efficiency high-speed territory.

Toll roads add another dimension. A toll route saving $5 in fuel via shorter distance but charging $8 in tolls is a $3 net cost — but the time savings might still justify it. Don't optimize fuel cost in isolation; total trip cost (fuel + tolls + time × your time value) is the more useful comparison.

For trips in the 300–500 mile range, driving and flying often have surprisingly similar total costs once fuel, parking, ground transportation, and time are all accounted for. A 400-mile drive in a 30-MPG car at $3.50/gallon costs $47 in fuel, plus 6+ hours each way; a $250 round-trip flight plus $80 in airport-related costs (parking, transit) plus 4+ hours each way may be roughly comparable in money but offers different time and flexibility profiles.

Multiplying by passengers changes the calculus quickly. A family of four flying often costs $800–$1,200 in airfare alone; the same family driving might cost $100 in fuel. For families, the break-even with flying often pushes much further out — driving is typically cheaper for any trip 1,000 miles or less.

A typical EV charging at home costs around $0.04–0.07 per mile in fuel-equivalent — substantially less than a gasoline car at $0.10–0.15 per mile. Over 15,000 annual miles, the difference is $750–$1,500/year. Combined with lower maintenance costs (no oil changes, simpler powertrain), EVs typically have lower per-mile operating costs than ICE vehicles.

The break-even on the EV's higher purchase price depends on annual mileage, fuel prices, electricity rates, federal/state incentives, and resale value. For high-mileage drivers in expensive-fuel markets, EVs often pay back within 3–5 years. For low-mileage drivers, the payback can stretch beyond the typical ownership period.