Plan Your Drive
Trip Cost Calculator
The Trip Cost Calculator helps you estimate how much fuel a journey will cost before you hit the road. Whether you are planning a weekend getaway, a daily commute, or a cross-country road trip, knowing the fuel cost upfront makes budgeting simple and stress-free.
To use it, you only need three numbers: the total distance of your trip in miles, your vehicle’s MPG (miles per gallon), and the current gas price per gallon. The calculator converts those into the number of gallons you will burn, then multiplies by the price to give you a total. It also breaks the cost down into cost per mile and cost per 100 miles, which are handy for comparing routes or vehicles.
These per-mile figures are especially useful if you are deciding between two cars, weighing a longer-but-flatter route against a shorter hilly one, or splitting fuel costs with passengers. Because real-world fuel economy shifts with speed, traffic, terrain, and weather, the result is a reliable estimate rather than an exact bill. For the most accurate number, use your highway MPG on long trips and your combined rating around town. Pair this tool with our other calculators to compare vehicles and find ways to spend less at the pump.
How to Use
- Enter the total trip distance in miles.
- Enter your vehicle’s MPG (use highway MPG for long drives).
- Enter the current gas price per gallon.
- Click Calculate Trip Cost (or press Enter).
- Review your total cost, gallons needed, and per-mile breakdown.
Related tools: MPG Calculator, Fuel Cost Calculator, Fuel Savings Calculator, and MPG to L/100km Converter.
Got Questions?
Trip Cost Calculator FAQ
Divide your trip distance by your vehicle’s MPG to get gallons needed, then multiply by the gas price. For example, a 300-mile trip in a 30 MPG car at $3.50/gal = (300 ÷ 30) × 3.50 = $35.
Use your highway MPG for long road trips, since steady highway driving is usually more efficient than city driving. If unsure, use your combined EPA rating for a safe estimate.
No. This calculator estimates fuel cost only. Add tolls, parking, food, and lodging separately to budget your full trip.
It is as accurate as your inputs. Real-world MPG varies with speed, terrain, traffic, weather, and load, so treat the result as a close estimate rather than an exact figure.
Drive at steady speeds, keep tires properly inflated, remove excess weight, avoid aggressive acceleration, and compare gas prices along your route before filling up.