Fuel Economy Calculator
Work out your car's fuel economy in litres per 100km from fuel used and distance travelled, and compare it with the manufacturer's rating.
Your results
Calculation breakdown
- L/100km
- L/100km = (litres used / km travelled) × 100
Worked example
Using 45L to travel 550km gives a fuel economy of about 8.2 L/100km.
Assumptions
- Assumes a full tank-to-tank fill for accuracy.
- Does not adjust for driving conditions.
How this calculator works
Enter the litres of fuel used and the distance travelled to calculate your car's real-world fuel economy in litres per 100km, the standard Australian measure. Compare this against the manufacturer's official figure to see how your driving style and conditions affect consumption.
Frequently asked questions
Why is my real fuel economy worse than the sticker figure?
Manufacturer figures come from standardised lab testing; real-world factors like traffic, air conditioning, load and driving style typically increase consumption.
What is a good L/100km figure?
Small cars often sit around 5-7L/100km, mid-size cars 7-9L/100km and larger SUVs or utes 9-12L/100km, though this varies by engine and conditions.
Can I use this for diesel vehicles?
Yes, the calculation works the same way regardless of fuel type; just enter the actual litres used.