Free Gas Calculator for Road Trips

Use this free gas calculator to estimate fuel cost for your next road trip. Enter your trip distance, vehicle MPG, and current gas price to instantly calculate your total fuel cost. This trip cost calculator also allows you to include hotels, food, tolls, and parking so you can budget your entire trip in seconds.

Whether you’re planning a long road trip, daily commute, or weekend getaway, knowing your gas cost ahead of time helps you save money and travel smarter.

How to Calculate Gas Cost

Divide your miles by MPG, then multiply by gas price. Example: 300 miles / 25 MPG × $4 = $48 fuel cost. This calculator does it instantly.

You can also track your mileage for tax purposes using our Business Mileage Log .