Fuel Cost Calculator
Estimate how much a trip will cost in fuel from distance, fuel economy and fuel price.
Runs 100% in your browser — nothing is uploaded.
Result
Formula
Cost = distance × (L/100 km ÷ 100) × price per litre
About this calculator
Estimate the total fuel cost for a road trip based on trip distance, vehicle fuel economy, and fuel price per litre. The calculator computes the fuel required by dividing the fuel economy (L/100km) by 100 to get litres per km, then multiplying by the trip distance.
How to use
- 1
Enter the total trip distance in kilometers.
- 2
Input your vehicle's average fuel economy in liters per 100 km.
- 3
Specify the fuel price per liter, then view your trip cost, fuel needed, and cost per km.
Frequently asked questions
How is fuel economy measured?
Fuel economy is typically expressed in litres per 100 kilometres (L/100km). Lower values indicate better efficiency. You can find this figure in your vehicle's manual or from official fuel economy ratings.
Can I use miles and gallons instead?
This calculator is designed for metric units (km, L/100km, price per litre). If you have data in miles per gallon (MPG), convert to L/100km using the formula: L/100km = 282.48 / MPG (US). For price per gallon, convert to price per litre by dividing by 3.78541.
Why is the cost per km useful?
Cost per km allows you to compare the fuel efficiency of different vehicles or the cost of different trips on a per-kilometre basis, which is helpful for budgeting or deciding between routes.
Please note: Results are estimates for general information only and are not professional or medical/financial advice.