Trip Cost Calculator

What This Calculator Does

You are planning a 350-mile road trip from Chicago to St. Louis with a friend. Your car gets 28 MPG. Gas is $4.15 per gallon. There are tolls on the Indiana and Illinois tollways. You will need parking downtown and lunch on the road. How much will the whole trip cost, and what does each person owe? This calculator adds up every component: fuel, tolls, wear and tear on your vehicle, parking, food, and lodging, then splits the total among passengers.

The tool takes your trip distance, vehicle fuel efficiency (or EV efficiency), fuel or electricity price, toll costs, parking, food, lodging, wear and tear rate, and number of passengers. It returns the total trip cost, cost per mile, cost per person, and a breakdown chart showing where every dollar goes. You can model round trips, compare gas versus EV costs, and adjust tolls from zero to high-density northeast corridor rates.

According to AAA, the national average gas price was $4.15 per gallon as of September 7, 2026, a record high for Labor Day. The IRS standard mileage rate for 2026 is 70 cents per mile, which includes fuel, maintenance, depreciation, and insurance. The Federal Highway Administration reports the median interstate toll is about 6 cents per mile, while non-interstate toll roads average 13 cents per mile. Some northeast corridor segments reach 50 cents per mile.

Inputs Required

• Trip Distance: One-way distance in miles or kilometers
• Round Trip: Toggle to double the distance and tolls
• Vehicle: Fuel efficiency (MPG) or EV efficiency (mi/kWh) with fuel or electricity price
• Wear & Tear: Per-mile cost for depreciation, tires, oil, and maintenance
• Tolls: Preset by road type or custom one-way toll amount
• Parking, Food, Lodging: Additional trip expenses in dollars
• Passengers: Number of people splitting the cost, including the driver

Outputs Provided

• Total Trip Cost: Sum of fuel, tolls, wear and tear, parking, food, and lodging
• Cost per Person: Total divided by number of passengers
• Cost per Mile: Total divided by distance for comparison across trips
• Cost Breakdown: Bar chart showing each expense category
• Fuel, Tolls, and Wear & Tear: Individual category totals

How the Calculation Works

The total trip cost is the sum of six categories. Each is calculated independently.

Fuel cost divides total distance by your MPG to find gallons consumed, then multiplies by the gas price. For EVs, it divides distance by miles per kWh and multiplies by the electricity rate. Tolls are either a per-mile rate plus a fixed fee (for preset toll types) or a custom one-way amount that doubles for round trips. Wear and tear multiplies distance by a per-mile rate that covers depreciation, tires, oil changes, and other maintenance. Parking, food, and lodging are flat dollar amounts you enter. The total is divided by the number of passengers for the per-person cost.

For the Chicago to St. Louis example: 350 miles one way, 700 miles round trip. Fuel: 700 / 28 x $4.15 = $103.75. Tolls (medium preset, 10 cents/mile): 700 x $0.10 + $4 = $74. Wear and tear: 700 x $0.07 = $49. Parking: $10. Food: $30. Lodging: $0. Total: $266.75. Split between 2 passengers: $133.38 each. Cost per mile: $0.38. For a more detailed fuel-only calculation, use our Fuel Cost Calculator.

How to Use the Calculator

1. Enter your one-way trip distance and select miles or kilometers.
2. Toggle round trip if you are driving back. The distance and tolls will double automatically.
3. Select a vehicle preset or enter your MPG and gas price manually. For EVs, enter efficiency in mi/kWh and electricity rate.
4. Set the wear and tear rate. The default of 7 cents per mile covers typical variable costs. The IRS rate of 70 cents includes all ownership costs.
5. Choose a toll preset based on your route type, or enter a custom one-way toll amount from a toll calculator like TollGuru.
6. Enter parking, food, and lodging costs if applicable. Leave at 0 if not needed.
7. Enter the number of passengers to see the per-person cost split.
8. Review the total cost, per-person cost, and breakdown chart.

Example Calculations

Example 1: Weekend Getaway for Two

Marcus and his girlfriend drive 220 miles round trip from Boston to a bed and breakfast in Vermont. Their sedan gets 30 MPG. Gas is $4.15 per gallon. Tolls on the Massachusetts Turnpike round trip are about $13.60 (custom tolls). Parking is free at the B&B. Food budget is $80 for the weekend. Lodging is $180 per night for 2 nights, $360 total. Wear and tear at 7 cents per mile: $15.40. Fuel: 220 / 30 x $4.15 = $30.43. Total: $30.43 + $13.60 + $15.40 + $0 + $80 + $360 = $499.43. Per person: $249.72. The lodging dominates the cost, which is typical for weekend trips.

Example 2: Cross-Country Move

Priya is moving from Los Angeles to Austin, a 1,230-mile one-way trip in a U-Haul truck getting 10 MPG. Diesel is $5.90 per gallon (AAA September 2026 average). Tolls are minimal (low preset, 5 cents per mile): 1,230 x $0.05 = $61.50. Wear and tear at 9 cents per mile: $110.70. Food for 3 days: $90. Lodging for 2 nights: $180. Parking: $0. Fuel: 1,230 / 10 x $5.90 = $725.70. Total: $1,167.90. This is a one-way trip, so no round trip multiplier. The fuel cost alone is 62% of the total, which is typical for low-MPG vehicles on long distances.

Real World Scenarios

Road Trip vs Flying Comparison

A family of four is traveling 800 miles from Atlanta to Orlando. Driving their SUV (22 MPG) at $4.15 per gallon: fuel is 800 / 22 x $4.15 = $150.91 round trip (1,600 miles). Tolls (low): $80. Wear and tear: $128. Parking at Disney: $30. Food: $120. Total driving cost: $508.91, or $127.23 per person. Flying: 4 round-trip tickets at $280 each = $1,120, plus airport parking $80, plus ground transport $60. Total flying cost: $1,260, or $315 per person. Driving saves $751.09 for the family. The break-even is when flight tickets drop below about $92 each. For fuel-only estimates, use our Fuel Cost Calculator.

Carpooling Savings on a Commute

Four coworkers commute 45 miles each way, 5 days a week, from a suburb to downtown. One person drives a 32 MPG sedan. Gas is $4.15 per gallon. Daily fuel: 90 / 32 x $4.15 = $11.67. Daily tolls (medium): 90 x $0.10 + $2 = $11. Daily wear and tear: 90 x $0.07 = $6.30. Daily parking: $15. Daily total: $43.97. Per person with 4 passengers: $10.99. Over 22 working days per month, each passenger pays $241.78. If the driver commuted alone, the daily cost would be $43.97, or $967.34 per month. Carpooling saves the driver $725.56 per month and gives each passenger a commute for less than the cost of daily parking alone.

EV Road Trip Cost

Derek drives his Tesla Model 3 (3.5 mi/kWh) 500 miles each way to visit family, 1,000 miles round trip. He charges at home before leaving at 16 cents per kWh and uses DC fast chargers on the road at 42 cents per kWh. Assuming 70% home charging and 30% fast charging: home energy is 700 / 3.5 = 200 kWh x $0.16 = $32. Fast charging is 300 / 3.5 = 85.7 kWh x $0.42 = $36. Total electricity: $68. Tolls (low): $50. Wear and tear at 4 cents per mile (EVs have lower maintenance): $40. Food: $25. Total: $183. The same trip in a 28 MPG gas car would cost $148.21 in fuel alone at $4.15 per gallon. The EV is competitive even with mixed charging. For detailed EV charging costs, use our EV Charging Cost Calculator.

Common Mistakes to Avoid

• Forgetting wear and tear: Fuel is only part of the cost. Tires, oil changes, brake pads, and depreciation add up. The IRS estimates total vehicle costs at 70 cents per mile for 2026. Even if you only count variable costs (fuel, tires, maintenance), that is 5 to 10 cents per mile. Over a 1,000-mile trip, that is $50 to $100 often overlooked.
• Underestimating tolls: Northeast corridor tolls can exceed $50 for a single trip. The Pennsylvania Turnpike charges about 7.3 cents per mile plus interchange fees. The New Jersey Turnpike from exit 1 to exit 18W costs $13.85 for a passenger car with E-ZPass. Use a toll calculator like TollGuru for exact rates on your route.
• Not splitting costs fairly: The driver bears more wear and tear and risk. A common approach is to split fuel and tolls equally among all passengers, with the driver covering their own wear and tear. Alternatively, split the total cost including wear and tear equally. Agree on the method before the trip to avoid awkwardness.
• Using highway MPG for all driving: City driving, mountain roads, and heavy loads reduce fuel efficiency. A car rated at 30 MPG highway may get 22 MPG in city traffic. Use the appropriate MPG for your route, or use a blended average if the trip mixes road types.

Limitations of This Calculator

This tool estimates trip cost from the inputs you provide. Toll presets use regional averages and may not match your exact route. For precise toll costs, use a dedicated toll calculator like TollGuru or USATolls.com. The wear and tear rate is a user input and should reflect your vehicle's actual variable costs. The calculator does not account for traffic delays (which reduce fuel efficiency), weather conditions, route deviations, or unexpected expenses like repairs. For EV trips, charging stop time and potential idle fees at fast chargers are not included. The IRS standard mileage rate of 70 cents per mile includes fixed costs like insurance and registration that do not increase with each trip, so using the full IRS rate overstates the marginal cost of a single trip.

Authoritative Research and Resources

• IRS: 2026 Standard Mileage Rates - The IRS sets the standard mileage rate at 70 cents per mile for 2026, covering fuel, maintenance, depreciation, and insurance. Useful as a benchmark for total vehicle operating costs.
• TollGuru: US Toll Calculator - Calculates exact toll costs for specific routes across all 37 US toll states, including E-ZPass, SunPass, and cash rates for major toll roads.
• AAA Gas Prices - Daily updated national and state-level average gas prices. The national average was $4.15 per gallon as of September 7, 2026.

For related tools, try our Fuel Cost Calculator for fuel-only trip costs, our EV Charging Cost Calculator for EV charging expenses, or our Gas Mileage Calculator to calculate your real-world MPG.