LITERGO / 05
Road Trip Gas Cost Calculator
Estimate gas costs for a road trip using miles, MPG and the price per US gallon. Calculate round trips and split expenses between passengers.
Enter values to calculate
LITERGO / 05Estimates depend on driving conditions.
How to calculate gas cost for a road trip
Enter the one-way distance in miles, your vehicle’s fuel economy in MPG, and the gas price per US gallon. LiterGo estimates the gallons needed and total fuel cost. Turn on Round trip to include the return drive.
Road trip fuel cost formula
US gallons needed = total miles ÷ MPG. Fuel cost = gallons needed × gas price per gallon. If you enter optional tolls, they are added to the total. The cost per passenger is the total divided by the number of passengers.
How much gas do I need for 100, 300 or 500 miles?
At 25 MPG, 100 miles requires 4 US gallons, 300 miles requires 12 gallons, and 500 miles requires 20 gallons. At $3.50 per gallon, those trips cost $14, $42 and $70 in gas, respectively, before any tolls.
How do I split road trip costs between passengers?
Enter the total number of passengers, including the driver if they are sharing the cost. The calculator divides the estimated fuel and optional toll costs equally. For example, a $42 trip split between three people costs $14 per person.
Does driving speed affect fuel costs?
Yes. Higher speeds, stop-and-go traffic, hills, weather, tire pressure and vehicle load can change real-world fuel economy. For a more realistic estimate, use your actual MPG rather than a manufacturer rating.