Trip Cost Calculator

On a multi-day US road trip with paid lodging, fuel usually lands around 20 to 30 percent of the total and lodging takes the biggest slice at 40 to 50 percent. Food typically runs 15 to 25 percent for two to four travelers eating out three times a day, and tolls plus activities split the remainder. The breakdown shifts hard if you camp instead of book hotels (lodging drops to near zero and fuel becomes the dominant share) or if you cover huge daily miles in a low-MPG vehicle (fuel can climb above 40 percent).

Use the current national average from AAA or GasBuddy as a starting point, then add 20 to 40 cents per gallon if the route runs through California, the Pacific Northwest, or the Northeast, since those regions consistently price above the US average. Highway and tourist-corridor stations also tend to sit 20 to 50 cents above local averages, so build that into the estimate or plan to fuel up in town. The default $3.50 per gallon in this calculator is a midline figure that has tracked close to the US average through most of 2024 and 2025.

The Federal Motor Carrier Safety Administration and AAA both recommend a break every two hours or every 100 miles, whichever comes first, to limit drowsy-driving risk. That is the rule the calculator uses, so a 9-hour drive day surfaces 4 suggested rest stops. Stretch the legs, hydrate, and swap drivers if you have two licensed people along. After about 8 hours of total wheel time, fatigue compounds quickly even with breaks, so it is usually safer to stop for the night rather than push through.

Splitting lodging is the single biggest lever: two travelers in one hotel room cut the per-person nightly rate in half, and four cut it by 75 percent versus driving alone. Packing breakfasts and lunches from a cooler trims the food line item by 30 to 50 percent versus eating every meal out. Choosing a more efficient vehicle for the trip, or batching errands so you take one longer drive instead of two shorter ones, drops fuel per mile. The calculator updates per-person cost in real time, so toggle traveler count and meal cost to see which lever moves the needle most for your trip.

For two travelers covering less than about 800 miles one way, driving is usually cheaper once you add up airfare ($150 to $400 per person round trip on most domestic routes), rental car ($50 to $90 per day plus taxes and fees), and airport parking or rideshares at both ends. Past 1,000 miles each way, flying often wins on cost and almost always wins on time, especially for solo travelers. Run this calculator with your real distance, then price out a Google Flights search plus a rental quote for the same dates, and compare the two totals side by side.