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Fuel Cost & Road Trip Calculator

Calculate the total fuel cost for any road trip using distance, vehicle fuel efficiency (MPG or L/100km), and current fuel price per gallon or liter.

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1. Trip & Vehicle Details

2. Cost Estimate

Total Trip Fuel Cost
$37.50
Fuel required: 25.00 Liters
Cost Per Person (3 Passengers)
$12.50
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How to Use the Fuel Cost & Road Trip Calculator

  1. 1
    Enter trip distance (miles or km).
  2. 2
    Enter your vehicle fuel efficiency (MPG or L/100km).
  3. 3
    Enter current fuel price per gallon or liter.
  4. 4
    View total fuel cost, quantity needed, and cost per mile/km.

Practical Example & Use Case

Common Real-World Scenario

A 350-mile road trip at 32 MPG at $3.85/gallon costs $42.11 in fuel (10.94 gallons).

Technical Notes & Limitations

Browser Engine Architecture

Assumes constant fuel efficiency. Real-world MPG varies with speed, load, and terrain.

Frequently Asked Questions

What is the optimal speed for fuel efficiency?

Most vehicles peak at 45–65 mph. Above 65 mph, aerodynamic drag increases fuel use by 25–30%.

How do I convert L/100km to MPG?

MPG = 235.214 ÷ L/100km. So 7.0 L/100km = 33.6 MPG.