💵 Fuel Cost Calculator
Enter a trip's distance, your MPG, and the pump price to see what the fuel will cost — round trip or one way, once or many times over.
⛽ Price a Trip
💵 Fuel cost for 300 total miles
What is a Fuel Cost Calculator?
It turns a distance into a dollar figure. Give it how far you are going, how many miles your car squeezes from a gallon, and what fuel costs today, and it returns the gallons you will burn and the total at the pump — no mental arithmetic at the gas station required.
The round-trip and repeat-trip options make it just as useful for a one-off road trip as for budgeting a daily commute across a week, a month, or a year, while the cost-per-mile figure lets you compare journeys and vehicles on the same scale.
❓ Frequently Asked Questions
How is the fuel cost of a trip calculated?
Divide the distance by your MPG to get the gallons needed, then multiply by the price per gallon. The calculator handles this and also spreads the total across the miles to show a cost per mile you can compare between trips or vehicles.
How do the round-trip and number-of-trips options work?
Enter the one-way distance. Ticking round trip doubles it, and the number-of-trips field multiplies the whole journey — so a 100-mile round trip taken twice counts as 400 miles. Total distance, gallons, and cost all scale together.
What MPG should I use for the estimate?
Use your real observed MPG rather than the sticker figure for the most accurate cost. For a mostly-highway trip use your highway MPG; for stop-and-go city driving use your city MPG, since the two can differ by a wide margin.
Why does cost per mile matter?
Cost per mile normalises fuel spend so you can compare a short errand against a long haul, or one vehicle against another, on equal footing. It is also handy for setting mileage reimbursement or budgeting a commute over a month or year.