Fuel Cost Calculator

Fuel cost calculator and gas calculator for travel: use this gas cost calculator and fuel calculator to estimate travel expenses. This road trip gas calculator uses distance, efficiency, and price.

Updated

Gallon measurements use US gallons. Enter your total travel distance, including the return trip if needed.

Estimated trip fuel cost

$42.00

Fuel (US gallons)
12
Fuel (liters)
45.425
Distance (miles)
300
Distance (km)
482.803

Fuel cost at different efficiencies

Same trip distance and fuel price. Bars compare total fuel cost.

  • 5 mpg$210.00

    60 US gal / 227.125 L

  • 10 mpg$105.00

    30 US gal / 113.562 L

  • 20 mpg$52.50

    15 US gal / 56.781 L

  • 30 mpg$35.00

    10 US gal / 37.854 L

  • 40 mpg$26.25

    7.5 US gal / 28.391 L

  • 50 mpg$21.00

    6 US gal / 22.712 L

  • 60 mpg$17.50

    5 US gal / 18.927 L

Fuel only. Actual consumption depends on driving conditions and vehicle load.

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Trip fuel cost calculator: how it works

This fuel cost calculator estimates fuel needed and the price of that fuel. For miles per gallon, divide the trip distance in miles by mpg, then multiply gallons by the price per US gallon. A 300-mile trip at 25 mpg uses 12 US gallons (45.425 liters); at $3.50 per gallon, the fuel cost is $42.00.

Gas calculator with US and metric units

The gas calculator accepts miles or kilometers and four fuel efficiency units: miles per US gallon, liters per 100 kilometers, kilometers per liter, and liters per mile. For L/100 km, liters = kilometers × efficiency ÷ 100. For km/L, liters = kilometers ÷ efficiency. For liters per mile, liters = miles × efficiency.

Gas cost calculator: price and fuel needed

Use the gas cost calculator with a price per US gallon or per liter. One US gallon is 3.785411784 liters, and one mile is 1.609344 kilometers. The fuel calculator converts units before calculating cost and rounds only the displayed results. Imperial gallons are not supported.

What the estimate includes

The result covers fuel only. It excludes tolls, parking, maintenance, and other travel expenses. Enter the current price you expect to pay and an efficiency representative of your trip. Traffic, speed, weather, road grade, and vehicle load can change actual consumption.

Frequently asked questions

How to calculate fuel cost for a road trip?

Use this road trip gas calculator with your total distance, vehicle efficiency, and expected fuel price. The comparison bars show the fuel quantities and costs for other efficiencies at the same distance and price.

How much gas will my trip cost?

Divide miles by mpg and multiply by the price per US gallon. Include both legs in the distance if you want the cost of a round trip.

Can this fuel calculator use liters per 100 km?

Yes. Choose liters per 100 km, enter the efficiency, and choose either kilometers or miles for the distance. You can price fuel per liter or per US gallon.

Does the gas cost calculator fetch current fuel prices?

No. Enter the price you expect to pay. The result changes only when you submit your inputs.

Why is my actual fuel cost different?

The estimate assumes constant average efficiency and fuel price. Traffic, hills, weather, idling, and different pump prices can change the actual cost.

What's changed
  • Launched.

References