How is the fuel cost calculated?

For imperial units: gallons needed = distance ÷ MPG, then total cost = gallons × price per gallon. For metric units: liters needed = (distance × L/100km) ÷ 100, then total cost = liters × price per liter.

Does this account for traffic or driving style?

No — the calculator uses your stated fuel efficiency as-is. Real-world consumption varies with speed, traffic, A/C usage, and load. For highway trips, use your vehicle's highway MPG rating; for city-heavy routes, use the city rating.

Where can I find my vehicle's MPG or L/100km?

Check your owner's manual, the sticker inside the driver's door jamb, or look up your make and model on fueleconomy.gov (US) or Natural Resources Canada's fuel consumption guide.

What is a good MPG for a road trip?

Most sedans and compact SUVs achieve 28–40 MPG on the highway. Larger SUVs and trucks range from 16–24 MPG. Hybrids can exceed 50 MPG. Higher MPG means lower fuel costs for the same distance.

Can I calculate costs in other currencies?

Yes — just enter the gas price in your local currency per gallon or liter. The result will be in whatever currency you used for the price input.

Does this include tolls or other road trip expenses?

This tool focuses on fuel cost only. For a full trip budget, add toll estimates, food, lodging, and parking on top of the fuel figure shown here.

Road Trip Cost Calculator

Name: Road Trip Cost Calculator
Availability: InStock
Author: Nham Vu

Enter your trip distance, fuel efficiency, and gas price to instantly estimate your total road trip fuel cost.

Trip Details

Unit System

Trip Distance

Fuel Efficiency

MPG

Gas Price

$ /gal

Passengers (for cost split)

person(s)

Enter your trip details and click
Calculate Fuel Cost to see results.

Summary

Enter your trip distance, fuel efficiency, and gas price to instantly estimate your total road trip fuel cost.

How it works

Select your preferred unit system: imperial (miles, MPG, $/gal) or metric (km, L/100km, $/liter).
Enter the total distance of your road trip.
Enter your vehicle's fuel efficiency (MPG for imperial, L/100km for metric).
Enter the current gas or diesel price per gallon or liter.
Optionally add the number of passengers to see the cost split per person.
The calculator instantly shows total fuel needed, total cost, and cost per person.

Use cases

Plan a family road trip budget before hitting the highway.
Compare fuel costs between two vehicles for a long drive.
Estimate gas expenses for a cross-country move.
Calculate whether driving or flying is cheaper for a given trip.
Split fuel costs fairly among carpoolers.
Budget for a weekend getaway or camping trip.
Estimate fuel expenses for a rental car trip.
Track and plan recurring commute fuel costs.

Frequently Asked Questions

Last updated: 2026-06-10 · Reviewed by Nham Vu