How much does a cross-country road trip cost, and how do I calculate gas costs?

Short answer: a cross-country road trip in the US typically costs somewhere between $1,500 and $5,000+ for one to two people, with gas usually making up about a quarter to a third of the total. The gas math itself is simple: total miles ÷ your car's MPG × price per gallon. The rest — lodging, food, and everything else — is where the budget actually lives or dies.

Let's build the full picture, starting with the fuel formula and then covering every other cost that catches people by surprise.

The gas formula: three numbers you need

Calculating your fuel cost takes three inputs:

Total miles ÷ your car's fuel economy (MPG) × price per gallon = total gas cost.

That's it. Let's run a real example. A classic coast-to-coast route — say, New York to Los Angeles — is roughly 2,800 miles of driving. Add detours, sightseeing, and getting around towns, and a realistic total is around 3,200 miles.

Take a car that gets 30 MPG combined. 3,200 ÷ 30 = about 107 gallons. At the national average gas price of roughly $4.41 per gallon (AAA, early October 2026 — among the highest levels ever for this time of year), that's about $470 in gas.

Change the inputs and watch what happens: a less efficient SUV at 22 MPG needs about 145 gallons — roughly $640. A very efficient hybrid at 45 MPG needs about 71 gallons — roughly $315. Your car's efficiency matters more than almost anything else in this calculation.

A few refinements for accuracy: use your car's real-world MPG, not the EPA sticker — check your trip computer or track a few tanks. Gas prices vary enormously by state: as of early October 2026, states like California were over $6 a gallon while Gulf states were under $4. If your route crosses expensive states, budget accordingly. And add 10–15% to your mileage estimate for detours — nobody drives 2,800 miles without a single unplanned turn.

Lodging: usually the biggest expense

For most road-trippers, lodging costs more than gas. The range is enormous:

• Camping: $20–$40 a night at campgrounds, or free on dispersed public land where allowed. The cheapest option by far, and for many people the best part of the trip.
• Budget motels: $70–$120 a night in most of the country, more near cities and national parks.
• Mid-range hotels: $130–$200 a night.
• Vacation rentals: competitive for groups (splitting a house beats multiple hotel rooms), but watch for cleaning and service fees that inflate the nightly rate.

For a 7-day trip, the difference between camping ($200 total) and mid-range hotels ($1,200+) is the single biggest variable in your budget after the car's efficiency. Mix and match: camp some nights, hotel others. And book national-park-area lodging early — it sells out months ahead in peak season.

One underrated option: staying with friends or family along the route. Even two or three hosted nights can cut hundreds from the budget, and the visits are often trip highlights.

Food: the budget-killer nobody plans for

Food is where road trip budgets go to die quietly. Three restaurant meals a day for two people can easily run $100–$150 daily — over a week, that's $700–$1,000, potentially more than gas.

The fix isn't suffering; it's strategy:

• Pack a cooler. Breakfast supplies, sandwich ingredients, snacks, and drinks from a grocery store cost a fraction of restaurant equivalents. A $40 grocery run can cover two days of breakfasts and lunches.
• Eat one restaurant meal a day — usually dinner — and make it count. This is the enjoyable middle ground between total austerity and budget disaster.
• Seek out local spots over chains. Some of the best road trip food is also the cheapest: taco trucks, diners, barbecue joints, farmers' markets.
• Budget it explicitly. Decide on a daily food number per person before you leave — say $40–$50 for the cooler-plus-dinner strategy — and track loosely. Unbudgeted food spending expands to fill all available money.

Tolls, parking, and the nickel-and-dime costs

These are individually small and collectively meaningful:

• Tolls: crossing the eastern US can rack up significant tolls — budget $50–$150 depending on your route. Check your route on a toll calculator beforehand.
• Parking: cities charge for it, national parks charge entrance fees (currently $30–$35 per vehicle for most major parks, good for seven days), and some attractions have their own fees.
• Laundry: on a long trip, one laundromat stop beats packing two weeks of clothes.
• Supplies: sunscreen, phone chargers, a spare tire check, windshield washer fluid — the small stuff adds up to $50–$100 if you're starting from scratch.

None of these will break the trip alone. Together, unbudgeted, they create that "where did the money go?" feeling at the end.

Activities and attractions: budget the fun deliberately

The whole point of the trip is the stuff you do along the way. Price the big-ticket items in advance: guided tours, amusement parks, special excursions. National parks are a bargain (the $80 annual America the Beautiful pass pays for itself in three park visits). City attractions vary wildly — some museums are free, others charge $30+ per person.

A good approach: list your must-dos, price them, and put them in the budget as a line item. Then keep a smaller daily "spontaneous fun" allowance for the roadside attraction you couldn't resist. Both planned and spontaneous spending are fine — it's the unplanned kind that causes trouble.

The car itself: don't forget wear and depreciation

Your car is consuming itself as you drive. Beyond gas, a 3,000-mile trip means:

• An oil change if you're due (or will be due mid-trip — get it done before you leave).
• Tire wear: roughly, budget a few cents per mile for tires and general wear. It won't hit your wallet on the trip, but it's real cost.
• A pre-trip inspection: brakes, tires (including the spare), fluids, belts, battery. A $100 inspection beats a $1,000 tow in the desert. This is non-negotiable for older cars.
• Emergency fund for breakdowns: carry a credit card with room on it or an emergency cash reserve. Hope you don't need it; be glad you have it if you do.

Also consider: is your car the right car? Taking a 15-MPG truck cross-country versus renting an efficient car for the trip is worth calculating. Sometimes the rental pays for itself in fuel savings alone — plus you spare your own car the miles.

Putting it all together: three sample budgets

The budget trip (camping + cooler, 7 days, efficient car): Gas $350, camping $175, food $350, park fees and activities $200, tolls and misc $100. Total: roughly $1,200–$1,500 per person or per couple sharing costs.

The middle trip (mix of camping and motels, 7–10 days): Gas $450, lodging $700, food $600, activities $300, tolls and misc $150. Total: roughly $2,200–$2,800.

The comfortable trip (hotels, restaurants, 10–14 days): Gas $500, lodging $1,800, food $1,400, activities $500, misc $300. Total: roughly $4,500–$5,500+.

These are illustrative, not quotes — your route, your car, and current prices move every number. But notice the structure: gas is the most predictable cost and rarely the largest. Lodging and food are where the trip's price is really decided.

What about doing it in an EV?

Electric vehicles change the road trip math in interesting ways. "Fuel" costs drop dramatically if you charge at hotels or plan around charging stops — home-rate charging on the road is rare, but many hotels now offer free destination charging, which is effectively free fuel.

The trade-off is time and planning. DC fast charging adds 20–40 minutes per stop every couple of hundred miles, and Supercharger pricing (typically $0.30–$0.45 per kWh, higher at peak times) makes the per-mile cost higher than home charging though still usually below gasoline at current prices. You'll also want to plan your route around charger availability — fine on interstates, spottier in remote areas.

For a cross-country trip, budget roughly similar total "fuel" costs to an efficient gas car if you rely on fast chargers, less if you can charge overnight at hotels. The bigger cost is time: an EV road trip is a slower, more deliberate journey. Some people love that rhythm. Others find it maddening. Know which you are before committing.

Saving and tracking for the trip

Once you have your estimate, add a 10–15% buffer for the unexpected — the detour, the repair, the incredible meal. Then divide by the months until departure for your monthly savings target, and automate it into a separate account.

On the road, track spending loosely — a notes app with daily totals is enough. Check in every few days: are you on pace? The goal isn't to stress over every dollar; it's to catch drift early, while there's still trip left to adjust.

A cross-country road trip is one of the best value-for-money adventures available. For the price of a few days at a resort, you can see a continent. Do the gas math, budget the lodging and food honestly, keep a buffer, and then stop budgeting and enjoy the drive. The spreadsheet gets you there; the trip is what happens between the numbers.