Gas Trip Cost Calculator

Estimate road-trip fuel in US gallons from miles and MPG, add tolls and parking, and split the total travel budget.

This tool has been used 17 times

The prefilled values are an example. Replace them with your own figures. All money amounts are in US dollars.

One-way distance (miles)

Trip type

Fuel economy (miles per US gallon)

Gas price (USD per US gallon)

Number of travelers sharing costs

Whole-trip tolls (USD)

Whole-trip parking (USD)

Extra budget cushion (%)

Calculated locally in your browser. This calculator does not send your inputs or save them on the server.

Read the worked-example guide →

How to use this tool

1. Enter your one-way miles, choose one-way or round trip, and add your MPG, price per US gallon and the number sharing costs. Enter tolls and parking for the whole trip.
2. Select Calculate and review the results below the form.
3. Change any input and calculate again to compare another scenario. Use Clear to start over or Use example to restore the sample figures.
4. Read the linked guide for a worked example and check the calculation limits before relying on an estimate.