Planning Your Road Trip Gas Budget
A road trip gas calculator helps you estimate your fuel expenses before hitting the road. Knowing the cost upfront allows you to budget properly, decide whether to drive or fly, and fairly split expenses among passengers.
The calculation is straightforward: determine the total distance (one-way or round trip), divide by your vehicle's MPG to get gallons needed, then multiply by the gas price. For group trips, divide the total by the number of riders.
Trip Cost Formulas
Popular US Road Trip Gas Costs
| Route | Distance | Gas Cost (25 MPG) | Round Trip |
|---|---|---|---|
| NYC to Boston | 215 mi | $30.10 | $60.20 |
| LA to Las Vegas | 270 mi | $37.80 | $75.60 |
| Chicago to Detroit | 280 mi | $39.20 | $78.40 |
| LA to San Francisco | 380 mi | $53.20 | $106.40 |
| NYC to Miami | 1,280 mi | $179.20 | $358.40 |
Frequently Asked Questions
How do I estimate drive time?
A rough estimate is to divide total miles by 55 mph (average speed accounting for stops, traffic, and varying speed limits). For highway-heavy trips, you might average 60-65 mph; for city routes, 30-40 mph.
Should I factor in extra gas costs?
Yes. Plan for 10-15% extra gas beyond the calculated amount to account for detours, traffic, mountain driving, headwinds, and the fact that real-world MPG is often lower than rated MPG.
Is it cheaper to drive or fly?
For solo travelers on trips over 300 miles, flying is usually cheaper when you factor in time, food, and hotel costs. For 2+ people, driving is almost always cheaper since gas costs are shared but airline tickets multiply per person.