How to Calculate Gas Cost for Any Road Trip
Before you hit the road, know exactly what fuel will cost. The formula takes 30 seconds.
Gas cost = (Total miles / Your MPG) × Gas price per gallon. A 500-mile road trip in a 28 MPG car at $3.50 per gallon: 500 / 28 × $3.50 = $62.50. Split between 4 people: $15.63 each — less than a single movie ticket for an 8-hour adventure.
When Driving Beats Flying
For 1-2 people under 500 miles: driving wins on cost every time. For families of 4 under 800 miles: driving saves 60-80% versus four plane tickets. The break-even distance for solo travelers is roughly 500-700 miles, where a budget flight starts costing about the same as gas. But driving lets you bring unlimited luggage, stop wherever you want, and avoid airport hassles.
Save 15-20% on Gas
Drive 60-65 mph instead of 75+ (saves 15-20% on fuel efficiency). Use GasBuddy to find cheap stations along your route. Fill up before turnpikes and tourist areas where prices spike. Keep tires inflated to spec (saves 3%). Remove roof racks when not in use (reduces drag 5-10%).