Calculate your result
Enter your figures below. Values stay in your browser.
How to use Fuel Cost Calculator
- Enter your figures in the units shown beside each field. Keep monetary inputs in the same currency; money results are currently displayed in USD.
- Select the unit standard where the form offers a choice, then choose Calculate.
- Read the breakdown and compare the worked example below. Change one assumption to see its effect.
Formula used
Fuel used = miles ÷ MPG. Cost = fuel used × price per gallon. MPG and pump price must use the same selected US or Imperial gallon; no conversion is needed when both match.
Worked example
500 miles ÷ 30 MPG = 16.6667 gallons. At 3.50 per matching gallon, the journey costs 58.33. At 25 MPG the same journey costs 70.00.
What the result means
Use a measured MPG figure representative of the route. This estimates fuel only, excluding tolls, parking and accommodation.
Check your result
Results retain calculation precision internally and round for display. Keep the input values with the result so you can reproduce it. Use Reset to restore the example inputs, or Copy result to copy the displayed answer.
If the result does not agree with your own calculation, report the page, inputs and expected answer. See our methodology and reference sources for the standards used.
Related tools
Fuel Consumption Calculator
Fuel Consumption Calculator turns distance travelled and fuel used into a result you can check against the figures from your car, route or workshop note.
MPG Calculator
MPG Calculator works well as a second check: enter a measured trip and the correct gallon standard, then keep the original units beside the answer.
KM/L Calculator
KM/L Calculator works well as a second check: enter kilometres travelled and litres consumed, then keep the original units beside the answer.
L/100km Calculator
With L/100km Calculator, the result is built from distance travelled and fuel used; change one input at a time when comparing scenarios.
Formula, worked example and limitations updated September 10, 2026.