About This Road Trip Cost Calculator
What it adds up
This road trip cost calculator estimates fuel gallons, gas spend, total trip price, and the share each traveler owes. It relies on miles driven, your vehicle miles per gallon, pump price, and any extra costs like tolls or parking so you can plan the whole drive budget before leaving the driveway.
Why travelers love it
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Keeps fuel math on one screen without spreadsheets
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Shows how small changes in mpg or gas price shift the budget
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Helps track fair cost splits for friends, family, and carpool crews
How to plan your drive
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Enter the total miles for the route, round trip if needed.
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Add the vehicle mpg and current gas price in dollars per gallon.
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Include how many riders are paying and any extra fees you expect.
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Review gallons needed, fuel spend, and cost per traveler right away.
Pro tips for better estimates
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Bump mpg down a point or two if you will tow a trailer or pack heavy gear.
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Log your real mpg after the first fuel stop and update the numbers if needed.
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Keep a small buffer for snacks, roadside help, and last minute detours.
Common questions
Does it work for rentals?
Yes. Use the mpg from the rental listing or window sticker and add any one way or drop fees to the extra costs field.
How do I handle mixed costs?
Add fixed fees like toll tags or parking passes into extra costs so everyone pays a fair share.
What if riders change mid trip?
Update the number of travelers and rerun the calculation. The per person cost adjusts right away.