Trip Fuel Cost Calculator
Enter the trip distance, your vehicle's fuel economy (MPG) and the current gas price to estimate the total fuel cost for your trip.
Trip Fuel Cost Calculator
Estimate road trip fuel cost
Gallons needed = distance ÷ MPG. Total cost = gallons × price per gallon.
How Trip Fuel Cost Is Calculated
Gallons needed = trip distance ÷ vehicle MPG Total cost = gallons × price per gallon Cost per mile = price per gallon ÷ MPG
**Tips**: - Highway MPG is usually higher than city MPG — use a blended figure for mixed driving - Add 10–15% for detours, traffic and idling - Gas prices vary by state and station
**Round trip**: If this is a round trip, double the distance or multiply the result by 2.
- Gallons = distance ÷ MPG
- Cost = gallons × price per gallon
- Add 10–15% for detours and traffic
- Round trip: double the result
Worked Example
Example: 300-mile trip, 25 MPG, $3.50/gallon.
- Gallons = 300 ÷ 25 = 12 gallons - Total cost = 12 × $3.50 = $42.00 - Cost per mile = $3.50 ÷ 25 = $0.14/mile - Round trip = $84.00
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Open calculator →Frequently Asked Questions
Can I use this for kilometers and liters?
This calculator uses miles and gallons. Convert km to miles (÷ 1.609) and litres to gallons (÷ 3.785) before entering, or use the Unit Converter tool.
Does this include the return trip?
No. Enter the one-way distance for one-way cost, or double the distance for a round trip.
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