Fuel Cost Calculator

Road Trip Fuel Cost Calculator

Total Fuel Needed Total Fuel Cost
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Fuel Cost Calculator – Plan Your Road Trip Budget

Our free fuel cost calculator helps you estimate how much you'll spend on petrol or diesel for any journey. Whether you're planning a weekend getaway, a long interstate drive, or simply comparing the running cost of two different vehicles, this tool gives you an instant, accurate answer.

How to Use This Calculator

  1. Enter the total distance of your trip in kilometres or miles.
  2. Input your vehicle's fuel efficiency (L/100km, km/L, or MPG).
  3. Enter the current fuel price per litre or gallon.
  4. Click Calculate to see total litres needed and total cost.

Understanding Fuel Efficiency Units

  • L/100km – litres consumed per 100 kilometres. Lower is better. Common in India, Europe, Australia.
  • km/L – kilometres driven per litre. Higher is better. Common in India and Asia.
  • MPG (US) – miles per US gallon. Higher is better. Used in the United States.

Tips to Reduce Fuel Costs

  • Maintain steady highway speeds (80–100 km/h) for optimal fuel economy.
  • Keep tyres inflated to recommended pressure — under-inflation increases consumption by up to 3%.
  • Avoid excessive idling and aggressive acceleration.
  • Remove unnecessary roof racks and heavy loads from your boot.
  • Use cruise control on long highway stretches.

Frequently Asked Questions

How accurate is this fuel cost estimate?
The estimate is based on your stated fuel efficiency. Real-world consumption varies with traffic, AC use, terrain, and driving style — typically ±10–15% of the stated figure.
What is a good fuel efficiency for a car?
A fuel-efficient petrol car achieves 5–7 L/100km (14–20 km/L). Diesel cars are typically 10–20% more efficient. Hybrids can reach 3–4 L/100km in mixed driving.
How do I convert MPG to L/100km?
Divide 235.215 by the MPG figure. For example, 30 MPG = 235.215 ÷ 30 = 7.84 L/100km.
Can I use this for diesel vehicles?
Yes. Simply enter the diesel price per litre and your vehicle's diesel consumption figure. The calculation method is identical.