About this tool
Free Fuel Cost Calculator
Use the free WebToolsEdge Fuel Cost Calculator to estimate how much fuel a journey will use and how much the trip is likely to cost. Enter the driving distance, select kilometers or miles, add your vehicle's fuel efficiency, and enter the current petrol, gasoline, or diesel price. The calculator instantly shows estimated fuel consumption, total fuel expense, cost per kilometer, cost per mile, and the amount each passenger would pay. The calculator supports the most common international fuel economy measurements: kilometers per liter (km/L), liters per 100 kilometers (L/100 km), US miles per gallon (US MPG), and UK miles per gallon (UK MPG). Fuel prices can be entered per liter, per US gallon, or per imperial gallon, so travelers can calculate road trip costs without manually converting units. Multiple currencies are available for clear local estimates. Turn on the round-trip option to include the return journey, and increase the passenger count to divide the estimated fuel bill fairly. This is useful for daily commutes, airport transfers, delivery routes, vacations, business travel, ride sharing, and comparing the running cost of different vehicles. The result covers fuel only; tolls, parking, traffic, idling, route changes, weather, tire pressure, vehicle load, and driving style can affect the final expense. For the most accurate estimate, use the real distance from your planned route, a recent average fuel economy figure from your dashboard or trip history, and the latest local fuel price. Manufacturer mileage figures can be useful for comparison, but real-world consumption is often different. Recalculate when the route, vehicle, fuel price, or passenger count changes.
Planning more than one everyday task? Browse the Utility Tools collection for practical calculators and converters, or view the complete online tools directory.
Step by step
How to use Fuel Cost Calculator
- 1
Enter the one-way trip distance and choose kilometers or miles.
- 2
Enter your vehicle's fuel efficiency and select km/L, L/100 km, US MPG, or UK MPG.
- 3
Add the current fuel price and choose whether it is priced per liter, US gallon, or UK gallon.
- 4
Select the currency used for the fuel price.
- 5
Turn on Round trip when the return journey should be included and enter the number of passengers sharing the cost.
- 6
Review fuel needed, total cost, cost per distance unit, and cost per person, then copy the summary if needed.
Highlights
Fuel Cost Calculator features
Kilometers and miles distance support
km/L and L/100 km fuel economy calculations
US MPG and UK MPG conversion
Fuel prices per liter, US gallon, or UK gallon
One-way and round-trip estimates
Passenger fuel-cost splitting
Multiple currency formatting
Copyable trip cost summary
Questions
Fuel Cost Calculator FAQ
How do I calculate fuel cost for a trip?+
Enter the trip distance, your vehicle's fuel efficiency, and the current fuel price. The calculator converts the selected units, estimates the fuel required, and multiplies it by the fuel price.
Can I calculate fuel cost in miles and MPG?+
Yes. Choose miles for distance and select US MPG or UK MPG for fuel efficiency. The tool handles the required gallon and distance conversions automatically.
What is the difference between US MPG and UK MPG?+
A UK imperial gallon is larger than a US gallon, so the same vehicle has a higher numerical UK MPG figure. Select the measurement used by your vehicle or region for an accurate estimate.
Does the calculator support liters per 100 km?+
Yes. Select L/100 km and enter the amount of fuel your vehicle uses for every 100 kilometers. Lower L/100 km values indicate better fuel economy.
How does the round-trip calculation work?+
When Round trip is enabled, the calculator doubles the entered one-way distance before estimating fuel use and total cost.
Can I split the fuel cost between passengers?+
Yes. Enter the number of people sharing the fuel bill and the calculator divides the total estimated cost equally between them.
Does the result include tolls, parking, or other travel costs?+
No. The result estimates fuel cost only. Add tolls, parking, road fees, accommodation, and other expenses separately when planning a full travel budget.
Why might my actual fuel cost be different?+
Traffic, idling, speed, hills, weather, tire pressure, vehicle load, detours, and driving style can change real fuel consumption. Use recent real-world mileage and current fuel prices for the closest estimate.