Fuel Cost Calculator
Estimate how much gas your trip will cost. Enter distance, fuel efficiency, and price per gallon — works with MPG (US) or L/100km (metric).
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Frequently asked questions
How do I find my car's MPG?
Check the EPA fuelEconomy.gov database for your exact make, model, and year — it lists city, highway, and combined MPG. For real-world accuracy, divide the miles between fill-ups by the gallons of gas you put in. Most modern cars also display a running average MPG on the dashboard. Aggressive driving and short trips reduce MPG by 15-30% compared to EPA ratings.
How does electric compare to gasoline for trip cost?
A typical EV uses ~30 kWh per 100 miles. At the US average residential rate of $0.16/kWh, that's about $4.80 per 100 miles. A 25-MPG gas car at $3.50/gallon costs $14 per 100 miles — about 3× more. Public DC fast charging at $0.40/kWh narrows the gap to roughly $12 per 100 miles, comparable to gas. Home charging is where EV fuel savings actually materialize.
What are easy ways to improve fuel efficiency?
Slowing down from 75 mph to 65 mph improves MPG by ~10%. Properly inflated tires save another ~3%. Removing roof racks when not in use saves ~5% at highway speeds. Avoiding aggressive acceleration and braking can save 15-30%. Skipping idling (over 10 seconds, restart instead) saves measurable fuel on city trips.