Road Trip Gas Cost Calculator

Estimate fuel cost for a road trip from distance, miles per gallon and gas price, split between travelers.

Quick answer: Road Trip Gas Cost Calculator: Estimate fuel cost for a road trip from distance, miles per gallon and gas price, split between travelers. Everything runs in your browser, so nothing you enter is uploaded or stored.

Distance (miles, one way)

Car mpg

Gas price per gallon

Travelers sharing

Round trip?

How to use Road Trip Gas Cost Calculator

Enter your values in the fields.
The results update instantly as you type.
Note or copy the numbers you need.

Features

Instant results
Free, no signup
Runs in your browser, nothing is uploaded
Works on phone and desktop

How it works

Gas cost = (miles / mpg) x price per gallon, divided by the number of travelers to split it.

Worked example

A 1,200 mile round trip at 28 mpg and 3.40 a gallon uses about 43 gallons and costs 146, or 73 each for two people.

Frequently asked questions

How is gas cost calculated?

Gallons needed = miles / mpg, then times the price per gallon.

What if I drive back?

Double the distance for a round trip.

Is the Road Trip Gas Cost Calculator free?

Yes. It is free, needs no signup and works on any device.