Road Trip Cost Calculator
The short answer: a road trip's driving cost is fuel (miles ÷ MPG × gas price) plus the tolls and parking everyone forgets until they're at the booth. Enter the drive and this tool returns the full budget — total, per mile, and split per person, ready for the group chat.
Long drive ahead? Check the coverage first
Roadside assistance and rental coverage are cheap line items until the day they're priceless. Compare your current policy against quotes before a big trip — insurance partners (Insurify / Compare.com) are the planned partners for this slot.
How this is calculated
Total miles = one-way distance × 2 on a round trip. Gallons = miles ÷ MPG. Fuel cost = gallons × price. The budget = fuel + tolls + parking; per-person divides by your split count; per-mile divides by total miles so you can price detours on the fly. Worked example: a 500-mile one-way drive done as a round trip (1,000 miles) at 25 MPG and $3.60 uses 40 gallons = $144 of fuel; add $25 of tolls and $40 of parking for a $209 budget, $104.50 each for two people. For wear-and-tear honesty beyond fuel, run the same car through the cost-per-mile calculator — a long trip consumes tires and oil life too.
Frequently asked questions
What does this road trip calculator include?
The driving costs: fuel from distance, MPG, and gas price; plus tolls and parking you enter. Food, lodging, and wear are yours to add — the per-mile figure it returns makes extending the estimate easy (multiply by total miles for a rough all-in driving number using our cost-per-mile tool).
How do I estimate tolls for a route I haven't driven?
Use your mapping app's route details (most show toll roads on the route) or the toll authority's trip calculator for the states you'll cross. When in doubt, estimate the cash lanes rather than transponder rates, and remember some tolls are plate-billed with an added fee.
Should I enter one-way or round-trip distance?
Enter the one-way distance and pick "Round trip" if you're driving back — the tool doubles it. If your return route differs, enter the total you'll actually drive and select one-way.
How accurate is the fuel part?
As accurate as your MPG and price inputs. Highway driving often beats a car's combined rating, while roof boxes, bikes, speed, and mountains pull it down. Use the car's real highway figure from a past trip if you have one; the rest is arithmetic.