How do I estimate gas cost for a road trip?

Divide total miles by MPG to get gallons, then multiply by the gas price per gallon. This calculator adds that gas estimate to other road-trip costs.

Should I use one-way or round-trip miles?

Use the total miles you want to budget. For an out-and-back trip, enter the round-trip distance.

How are costs split between travelers?

The total budget is divided by the traveler count. Food is first calculated per person per day, while gas, tolls, parking, lodging and other costs are treated as shared trip costs.

Road Trip Cost Calculator

Estimate a road trip budget with gas, tolls, parking, food, lodging, other costs and per-traveler split.

Trip distance (mi)

Use round-trip miles if you want the full out-and-back budget.

Fuel economy (MPG)

Gas price ($/gal)

Tolls

Parking

Food per person per day

Lodging per night

Other trip costs

Trip length (days)

Travelers

Estimate Your Road Trip Budget

English road-trip cost searches usually expect more than gas. The calculator combines fuel, tolls, parking, food, lodging and a misc buffer, then splits the total across travelers.

Enter the full trip distance in miles, including the return leg if needed.
Add your vehicle MPG and expected gas price per gallon.
Enter tolls, parking, daily food per person, lodging per night and any other budget buffer.
Set trip length and traveler count to see the total, per-traveler share and cost per mile.

Planning estimate

This tool does not pull live gas prices, hotel rates, toll schedules or parking fees. Check current prices before booking or leaving.

Road Trip Cost Formula

G a s = \frac{M i l es}{M P G} \times P r i ce p er g a l l o n

F oo d = D ai l y f oo d \times D a y s \times T r a v e l er s

L o d g in g = N i g h tl y r a t e \times max (D a y s - 1, 0)

T o t a l = G a s + T o l l s + P a r k in g + F oo d + L o d g in g + O t h er

P er t r a v e l er = \frac{T o t a l}{T r a v e l er s}

Costs to Include

Cost	How to estimate it
Gas	Use route miles, realistic MPG and a local price per gallon.
Tolls	Check the route toll calculator or toll authority before the trip.
Parking	Add hotel, city, airport, event or trailhead parking separately.
Food	Use a daily amount per person so group size is handled correctly.
Lodging	Enter the room or lodging total per night, not per traveler unless that is how you plan to split it.
Other	Add a buffer for supplies, detours, attractions, fees or pet costs.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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