Road Trip Budget Calculator

What goes into a road trip budget

Fuel is the number everyone thinks of and it is usually the smallest line. On a typical week-long road trip, gas is around 15% of the total, while hotels, food and activities take the rest. Build the budget in five pieces and nothing sneaks up on you.

• Fuel, total miles ÷ your real MPG × the price per gallon.
• Lodging, nights × the nightly rate, remembering that road-trip hotel prices swing hard by city and season.
• Food, people × days × a daily per-person figure.
• Activities, tickets, tours, park passes, entry fees.
• Tolls, parking and extras, the small costs that add up fastest.

The calculator above takes each of those and turns them into a single total, then divides by people and by miles so you can compare one trip against another on the same footing. For real-world fuel economy figures by model, the US Department of Energy fuel economy site is the reference to check before you trust the sticker.

Worked example: a 1,500-mile week with two people

Start with the calculator defaults: 1,500 miles round trip, 28 MPG, $3.50 a gallon, 5 days, 4 hotel nights at $130, two people eating $45 a day, $200 of activities and $60 of tolls and parking.

• Fuel: 1,500 ÷ 28 = 53.6 gallons × $3.50 = $187.50
• Lodging: 4 × $130 = $520.00
• Food: 2 people × 5 days × $45 = $450.00
• Activities: $200.00
• Tolls and parking: $60.00
• Total: $1,417.50

That is $708.75 per person and about $0.94 per mile. Look at the shape of it: hotels are 37% of the trip and food is 32%, while fuel is only 13%. If you want to cut this budget, arguing about gas prices is a waste of time, dropping one hotel night saves $130, which is more than a 70-cent swing in the price of gas would ever recover.

Add a 12% buffer for the unexpected and you should carry about $1,590, or $795 each. That buffer is what pays for the flat tire, the storm that forces an extra night, and the restaurant that turns out to be the highlight of the trip.

Worked example: a 3,000-mile cross-country run

Now scale it up. Two people, 10 days, 3,000 miles each way, a 34 MPG car, gas at $3.80, 9 nights at $110, food at $40 per person per day, $300 of activities and $80 of tolls.

• Fuel: 3,000 ÷ 34 = 88.2 gallons × $3.80 = $335.29
• Lodging: 9 × $110 = $990.00
• Food: 2 × 10 × $40 = $800.00
• Activities: $300.00
• Tolls and parking: $80.00
• Total: $2,505.29

That is $1,252.65 per person and about $0.84 per mile, cheaper per mile than the short trip, because a long trip spends a higher share of its miles driving and a lower share sitting in a hotel. Doubling the distance did not double the cost: 2× the miles cost about 1.8× the money.

The single biggest lever is still lodging. Camping for three of those nine nights at $25 a night instead of $110 saves $255, which is nearly as much as the entire fuel bill. Food is the second lever, and a cooler plus a supermarket breakfast is the easiest $15 a day you will ever save.

Road trip budget at a glance

Typical all-in costs per person per day for US road trips, depending on how you travel.

Where each dollar goes on a mid-range trip:

Note how the two biggest categories are also the two easiest to cut, and the category people obsess over, fuel, is the hardest to change and the smallest of the five. For mileage and expense record-keeping, the IRS standard mileage rates give a defensible per-mile figure, and the US Energy Information Administration tracks retail gasoline prices by region.

Getting your fuel estimate right

The fuel line is the one people get most wrong, because the MPG on the window sticker is measured in a lab and you are driving a loaded car at 70 mph with the air conditioning on. Real-world highway economy usually comes in 10% to 20% below the sticker.

• Use 0.85 × the sticker MPG as a planning figure. A 32 MPG car becomes 27 MPG.
• Expect worse in mountains, headwinds and cold weather. Climbing a pass can cut economy by a third.
• Roof racks and trailers cost you. A roof box can add 10% to 25% to fuel use at highway speed.
• Track one real tank. Miles driven ÷ gallons filled is your true highway number, and it beats any estimate.

Gas prices also vary enormously by state and by distance from an interstate. Budgeting at the national average and then filling up in a remote area is how a fuel line quietly runs 20% over. Check regional prices before you go, and remember that a 1,500-mile trip at 28 MPG uses about 54 gallons, so even a 50-cent swing per gallon is only $27 across the whole trip.

Turning the estimate into a plan

A budget is only useful if it changes what you do, so use the calculator to test decisions before you book anything. Try dropping one hotel night and see the total fall; try adding a third person and watch the per-person number drop, because fuel and lodging split further while food does not.

Then build the buffer in. Most trips overshoot by 10% to 15%, and the reasons are always the same: an unplanned extra night, a detour worth taking, a mechanical problem, or a hotel that costs more than the one you researched. Carrying that buffer is not pessimism, it is what keeps a blown tire from ending the holiday.

Finally, keep a simple record as you go, a note on your phone with fuel, lodging and food totals each day. By day three you will know whether you are running hot, and you still have time to adjust rather than discovering it on the drive home. Every figure on this page is an estimate built from the numbers you enter; the road will supply the real ones. Confirm prices and rates with the actual providers before you commit.