Which unit systems are supported?

Imperial (miles, MPG, price per gallon) and metric (km, L/100 km or km/L, price per liter). Switch the toggle at the top and all labels and calculations update automatically.

How is the fuel cost calculated?

For MPG: cost = (distance / MPG) x price per gallon x trip multiplier. For L/100 km: cost = (distance / 100) x consumption x price per liter. For km/L: cost = (distance / km per liter) x price per liter. The trip multiplier is 2 for round trips and 1 for one-way.

How does the per-passenger split work?

The total fuel cost is divided equally among all passengers (including the driver). Set the passenger count to 1 if you are driving alone.

Does this tool save my data?

No. The calculator runs entirely in your browser. Nothing is sent to any server and the inputs reset when you refresh the page.

Fuel Trip Cost Calculator

Enter distance, fuel efficiency, and price per unit to instantly calculate the total fuel cost for your trip — with round-trip and per-passenger split support.

Unit System

Switch between imperial and metric units.

Trip Details

Distance (miles, one way)

Trip Type

Round trip One way

Vehicle Fuel Efficiency

Fuel Efficiency (MPG)

Average passenger car: 25–35 MPG. Trucks and SUVs: 15–25 MPG.

Fuel Price

Price (per gallon)

Currency

Passengers

Number of passengers (including driver)

Total cost is split equally. Set to 1 if driving alone.

Fuel Cost Summary

Enter a distance to see the fuel cost.

Summary

The Fuel Trip Cost Calculator estimates how much you will spend on fuel for any road trip. Enter your one-way or round-trip distance, your vehicle's fuel efficiency, and the current fuel price to see the total instantly. Switch between imperial (miles/MPG/gallon) and metric (km/L per 100 km/liter) units, and split the cost equally among multiple passengers for carpool budgeting.

How it works

Enter the trip distance in miles or kilometers.
Set your vehicle's fuel efficiency in MPG, L/100 km, or km/L.
Enter the current fuel price per gallon or liter.
Choose one-way or round trip — the total distance updates automatically.
Optionally enter the number of passengers to see the per-person cost.
Results update instantly as you type.

Use cases

Budgeting fuel expenses for a weekend road trip.
Comparing two vehicles to see which is cheaper for a long route.
Splitting gas costs fairly among carpooling passengers.
Estimating fuel spend before booking a rental car.
Planning a cross-country drive and checking your total fuel budget.
Calculating monthly commute fuel costs based on daily mileage.
Fleet managers estimating per-trip fuel spend for company vehicles.
Checking whether driving or flying is cheaper for a given trip.

Frequently Asked Questions

Last updated: 2026-06-13 · Reviewed by Nham Vu