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Formula
Total = Fuel + Tolls + Parking + (Nights × Rate) + (Food per day × Days × Travelers)
- Fuel
- distance ÷ mpg × price per gallon (distance doubled for a round trip)
- Tolls, Parking
- totals for the whole trip
- Nights × Rate
- lodging nights times the cost per room per night
- Food per day × Days × Travelers
- daily food budget per person, for every day and every traveler
What the trip cost calculator covers
Fuel is only part of what a road trip costs. Once you add hotel nights, meals, tolls and parking, gas is often the smallest line. The trip cost calculator builds the whole budget in one go: it works out the fuel from your route and car, adds the other costs you enter, and shows the total, a breakdown of where the money goes and the cost per person.
Every field except the distance, fuel economy and fuel price is optional. Leave out what doesn’t apply, such as lodging on a day trip, and it simply isn’t counted.
How to use the calculator
- Distance and round trip. Enter the one-way distance in miles or kilometers. Round trip is ticked by default, so the calculator doubles it. Untick it for a one-way drive.
- Fuel economy and price. Enter your car’s mpg (or L/100 km or km/L) and the fuel price per gallon or per liter.
- Tolls and parking. Enter the total for the whole trip, both directions included.
- Lodging. Enter the number of nights and the cost per night, including taxes and fees.
- Food. Enter a daily food budget per person and the trip length in days.
- Travelers. Enter how many people are going. Food is multiplied by this number, and the total is divided by it.
The breakdown bar shows which costs dominate, so you can see where saving is easiest, whether that’s a cheaper hotel or packing lunches.
How to calculate a trip budget by hand
Here’s a three-person weekend away: 410 miles each way in a car that averages 29 mpg, gas at $3.25 a gallon, $24 in tolls, $30 for parking, 3 hotel nights at $129, and a food budget of $45 per person per day over 4 days.
- Fuel: 820 miles ÷ 29 mpg = 28.28 gallons × $3.25 = $91.90
- Tolls and parking: $24 + $30 = $54
- Lodging: 3 × $129 = $387
- Food: $45 × 4 days × 3 people = $540
- Total: $91.90 + $54 + $387 + $540 = $1,072.90
- Per person: $1,072.90 ÷ 3 = $357.63
Food and lodging together are about 86% of this budget, while fuel is under 9%. That’s typical of multi-day trips and a good reason to budget the whole trip, not just the gas.
Road trip budget for different trip lengths
The table shows how the parts of a budget grow for a group of two, with one more day than nights, a 30 mpg car, gas at $3.50 a gallon, $130 a night for lodging and $40 per person per day for food. Fuel depends only on distance; lodging and food depend on the number of days.
| Trip | Round-trip miles | Fuel | Lodging | Food (2 people) | Total | Per person |
|---|---|---|---|---|---|---|
| Day trip | 200 | $23.33 | $0 | $80 | $103.33 | $51.67 |
| Weekend, 2 nights | 500 | $58.33 | $260 | $240 | $558.33 | $279.17 |
| 4 nights | 900 | $105.00 | $520 | $400 | $1,025.00 | $512.50 |
| 7 nights | 1,600 | $186.67 | $910 | $640 | $1,736.67 | $868.33 |
Ways to use a trip cost calculator
Planning a family vacation by car
Enter the route, your car’s real mileage and the number of nights to see the full price before you book. If the total is higher than planned, the breakdown shows whether trimming a night or a restaurant meal makes the biggest difference.
Splitting costs with friends
Shared costs (fuel, tolls, parking, the room) are split evenly, and food scales with the number of people. The cost per person is the figure to send around the group chat.
Comparing driving with flying
Price the drive here, then compare it with airfare for everyone plus airport parking and transport at the other end. For two or more travelers on trips of a few hundred miles, driving is often cheaper, though it costs more time.
Checking just the fuel
If you only need the gas figure for a single drive, the gas cost calculator gives it along with the cost per mile and the fuel needed.
Common mistakes
- Using the sticker mpg. Highway speeds, a loaded car and roof boxes all lower mileage. Measure your real figure with the MPG calculator or round your estimate down a little.
- Counting days and nights the same. A 4-day trip usually has 3 nights. Food is per day; lodging is per night.
- Entering one-way tolls. Enter the toll total for both directions on a round trip.
- Forgetting hotel taxes and fees. Resort fees and occupancy taxes can add a noticeable amount to the advertised nightly rate.
- Leaving out a buffer. Detours, snacks and a pricier gas station add up. Adding 10% to the total is a sensible cushion.
Glossary
- Round trip: there and back by the same route, so twice the one-way distance.
- Per diem: a daily allowance for meals and incidental costs, published by the GSA for U.S. government travel.
- Shared costs: expenses paid once for the whole group, such as fuel, tolls and the hotel room.
- Per-person costs: expenses that scale with the number of travelers, such as food.
Worked examples
A family road trip with two hotel nights
275 miles each way at 26 mpg and $3.39 a gallon, $18 in tolls, 2 nights at $139, and $40 of food per person per day for 4 people over 3 days.
Inputs: Distance (one way) = 275; Distance (one way) unit = Miles; Round trip (double the distance) = Yes; Fuel economy = 26; Fuel economy unit = Miles per gallon (mpg); Fuel price = $3.39; Price per = Per gallon; Tolls (whole trip) = $18; Parking (whole trip) = $0; Lodging nights = 2; Lodging cost per night = $139; Trip length = 3 days; Food per person per day = $40; Travelers = 4
Fuel: 550 mi at 26 mpg = 21.15 gal × $3.39 = $71.71 Lodging: 2 × $139.00 = $278.00 Food: $40.00 × 3 days × 4 = $480.00 Total: $71.71 + $18.00 + $278.00 + $480.00 = $847.71 Per person: $847.71 ÷ 4 = $211.93
Answer: A 550 mi round trip with fuel at $3.39 per gallon costs $847.71 in total, or $211.93 each for 4 travelers.
Fuel-only day trip for two
A 95-mile drive each way at 33 mpg with gas at $3.59, split between two people; no tolls, lodging or food entered.
Inputs: Distance (one way) = 95; Distance (one way) unit = Miles; Round trip (double the distance) = Yes; Fuel economy = 33; Fuel economy unit = Miles per gallon (mpg); Fuel price = $3.59; Price per = Per gallon; Travelers = 2
Fuel: 190 mi at 33 mpg = 5.76 gal × $3.59 = $20.67 Per person: $20.67 ÷ 2 = $10.33
Answer: A 190 mi round trip with fuel at $3.59 per gallon costs $20.67 in total, or $10.33 each for 2 travelers.
A metric one-way drive with parking
540 km one way at 7.2 L/100 km with fuel at $1.72 per liter, $25 parking, 1 night at $95 and $35 of food per person per day for 2 people over 2 days.
Inputs: Distance (one way) = 540; Distance (one way) unit = Kilometers; Round trip (double the distance) = No; Fuel economy = 7.2; Fuel economy unit = Liters per 100 km (L/100 km); Fuel price = $1.72; Price per = Per liter; Parking (whole trip) = $25; Lodging nights = 1; Lodging cost per night = $95; Trip length = 2 days; Food per person per day = $35; Travelers = 2
Fuel: 540 km at 7.2 L/100 km = 38.88 L × $1.72 = $66.87 Lodging: 1 × $95.00 = $95.00 Food: $35.00 × 2 days × 2 = $140.00 Total: $66.87 + $25.00 + $95.00 + $140.00 = $326.87 Per person: $326.87 ÷ 2 = $163.44
Answer: A 540 km trip with fuel at $1.72 per liter costs $326.87 in total, or $163.44 each for 2 travelers.
Assumptions and limitations
- Fuel cost uses the same method as the gas cost calculator, with exact unit conversions (1 mile = 1.609344 km, 1 US gallon = 3.785411784 L) and a constant fuel economy for the whole drive.
- Round trip is ticked by default and doubles the one-way distance. Tolls and parking are entered as totals for the whole trip.
- Lodging is nights × cost per night for one room. If your group needs two rooms, enter the combined nightly cost.
- Food is a per-person daily budget multiplied by the number of days and travelers. Lodging, fuel, tolls and parking are shared costs.
- Cost per person is the total divided equally among travelers. Leave travelers at 1 to see the trip cost for one person.
- Activities, tickets, insurance, vehicle wear and depreciation are not included. Add them yourself if they matter for your budget.
Frequently asked questions
How do I calculate the cost of a road trip?
Add the fuel cost to every other expense. Fuel is the round-trip miles ÷ mpg × the gas price. Then add tolls, parking, lodging (nights × nightly rate) and food (daily budget × days × people). The trip cost calculator does all of this in one place.
How much should I budget for food on a road trip?
It depends on where you eat. As a reference, the U.S. General Services Administration publishes per diem rates for meals and incidental expenses for every county, which many people use as a realistic daily food allowance for travel.
How do you calculate trip cost per person?
Add up every cost for the trip and divide by the number of travelers. The simplest fair method divides the total equally, which is what the cost per person shows. If some people share rooms and others don't, or one person paid for the car, split those items separately and settle the rest equally.
Is it cheaper to drive or fly?
For a group, driving often wins because fuel, tolls and parking are shared while airfare is per person. Price the drive here, including any extra hotel nights the drive needs, and compare it with the total of all plane tickets plus a rental car or rides at the destination.
Should I include car wear and tear in my trip cost?
For a personal budget, most people count only cash they'll spend. For reimbursement or for comparing driving with flying, a per-mile figure for maintenance and depreciation gives a truer cost. This calculator covers out-of-pocket costs only.
How do you calculate travel cost per km or per mile?
Divide the total trip cost by the distance driven. A $600 trip covering 1,000 km costs $0.60 per km. For fuel alone, the gas cost calculator shows the cost per mile and per km directly.
How do I estimate tolls?
Most route planners and toll authority websites show the toll for a route. Add both directions if you're driving there and back, then enter the total.
Sources
- Per diem rates — U.S. General Services Administration. Checked October 10, 2026.
- Gas Mileage Tips - Driving More Efficiently — U.S. Department of Energy and EPA (fueleconomy.gov). Checked October 10, 2026.
- Gasoline and Diesel Fuel Update — U.S. Energy Information Administration. Checked October 10, 2026.