Fuel Cost Calculator
This fuel cost calculator estimates how much fuel a trip needs and what it will cost from the distance, your vehicle's fuel efficiency and the fuel price, in metric (km, km/L, per litre) or imperial (miles, MPG, per gallon) units.
About this tool
This fuel cost calculator estimates how much fuel a trip needs and what it will cost from the distance, your vehicle's fuel efficiency and the fuel price, in metric (km, km/L, per litre) or imperial (miles, MPG, per gallon) units.
How to use it
- Choose metric (km/L) or imperial (MPG).
- Enter the trip distance and your vehicle's fuel efficiency.
- Enter the fuel price per litre or gallon.
- Read the total fuel cost, fuel needed and cost per 100 km or miles.
Good to know
- Fuel needed = distance ÷ fuel efficiency; total cost = fuel needed × price per litre or gallon.
- Example: 500 km at 15 km/L needs about 33.3 L; at 1.80 per litre that costs 60.00.
- The tool also shows the cost per 100 km (or per 100 miles), handy for comparing vehicles.
- To convert from L/100 km, divide 100 by the figure: 6.7 L/100 km is about 15 km/L.
Runs entirely in your browser — nothing you enter is uploaded or stored.
Frequently asked questions
How do I calculate fuel cost for a trip?
Divide the distance by your fuel efficiency to get the fuel needed, then multiply by the fuel price. 500 km at 15 km/L and 1.80 per litre costs 60.
My car shows L/100 km — what do I enter?
Divide 100 by your L/100 km figure to get km/L. For example, 6 L/100 km equals about 16.7 km/L.
Should I plan for a round trip?
Enter the total distance you will drive. For a return journey, double the one-way distance.
Why is my real fuel use higher than the estimate?
Speed, traffic, air conditioning, load and terrain all change consumption. Using your car's real-world average gives a closer estimate than the official rating.