Fuel Cost Calculator
Trip fuel cost from distance, economy and price.
Enter your values
ⓘ Live results
Results
- Total fuel cost
- $45.28
- Fuel needed
- 13.13 gallons
- Cost per person
- $45.28
- Cost per mile
- $0.108
- Round trip
- $90.56
Quick answer
Trip fuel cost is distance ÷ fuel economy × price per gallon or litre.
Cost = distance ÷ mpg × price
How to use the Fuel Cost Calculator
- 1Enter the trip distance.
- 2Enter your vehicle's real-world mpg.
- 3Add the current fuel price.
Worked example
Using the values the calculator loads with:
Inputs
- Trip distance420 miles
- Fuel economy32 mpg
- Fuel price3.45 $/gal
- Split between1 people
Results
- Total fuel cost$45.28
- Fuel needed13.13 gallons
- Cost per person$45.28
- Cost per mile$0.108
- Round trip$90.56
Frequently asked questions
Should I use the sticker mpg?
Use your own recent average — real-world economy is often 10–20% below the official figure, especially in city driving.
How do I convert L/100km to mpg?
Divide 235.2 by the L/100km figure to get US mpg.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.