Gas Trip Cost Calculator
Enter your trip distance and fuel economy. We fill in today's average gas price for the state you choose.
Trip fuel cost
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Fuel needed
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gallons
Per person
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Formula: distance ÷ mpg × price per gallon. Highway driving usually gets better mileage than the official combined figure; city driving worse.
Example: 350 miles at 28 mpg with gas at $4.069 costs about $50.86.
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Updated Nov 6, 2026, 11:10 AM EST