Enter your trip distance, fuel efficiency, and gas price to calculate exactly how much your journey will cost. The Fuel Cost Calculator tells you the total fuel cost, gallons or liters needed, and cost per mile or kilometer — with full support for metric and imperial units.
Total Fuel Cost
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Fuel Needed
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Cost per Mile / km
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Trip Distance (km)
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The calculator divides your trip distance by your vehicle's fuel efficiency to determine how much fuel you'll use, then multiplies that by the gas price. For example, a 250-mile trip in a car getting 30 MPG needs about 8.33 gallons. At $3.50/gallon, that's roughly $29.17.
The main factors are trip distance, your vehicle's fuel efficiency (MPG or L/100km), and the current gas price in your area. Driving conditions like highway vs. city driving, tire pressure, vehicle load, and speed also affect real-world fuel consumption.
To convert MPG to L/100km, divide 235.21 by your MPG value. For example, 30 MPG equals approximately 7.84 L/100km. The calculator handles this conversion automatically — just select your preferred unit from the dropdown.
The average new car sold in the US achieves around 28–32 MPG combined (city and highway). Older vehicles or larger trucks/SUVs may get 15–20 MPG, while hybrids can exceed 50 MPG. Enter your vehicle's specific rating for the most accurate result.
According to the American Automobile Association (AAA), the average American driver spends about $3,000 per year on gasoline. This varies significantly based on how much you drive, your vehicle's fuel efficiency, and local gas prices.
Yes. Select 'Kilometers (km)' as your distance unit and choose a matching efficiency unit like 'Liters per 100 km' or 'km/L'. You can also set gas price per liter instead of per gallon for a fully metric calculation.
Maintain steady highway speeds, keep your tires properly inflated, avoid excessive idling, and remove unnecessary cargo weight. Using cruise control on highways and planning routes to minimize stops can also meaningfully reduce fuel consumption.
No — you enter the gas price manually, which gives you full flexibility to use current local prices, future estimates, or compare scenarios. You can check today's average prices at sites like AAA or GasBuddy and enter them directly.