Quick example
Fuel cost for 300 miles at 30 mpg
The trip uses 10 US gallons. At $3.50 per gallon, estimated fuel cost is $35.00, or about $0.12 per mile.
Supported inputs
US and metric trip calculations
US mpg
Miles traveled per US gallon consumed—not an Imperial gallon.
L/100 km
Liters used for every 100 kilometers; lower values mean better economy.
km/L
Kilometers traveled per liter; higher values mean better economy.
Fuel prices
Enter a price per US gallon or per liter independently of the distance units.
Estimate limits
Real fuel use changes with conditions
Traffic, speed, weather, elevation, payload, tire pressure, detours, idling, and driving style can change consumption. Add a reasonable buffer for planning, especially when fuel availability is limited.
Common questions
Fuel cost FAQ
How is trip fuel cost calculated?
Fuel used is derived from distance and efficiency, then multiplied by the entered fuel price.
Is mpg based on US gallons?
Yes. Use the Fuel Economy Converter first if your value is Imperial mpg.
Does this include tolls and maintenance?
No. The estimate covers fuel only.