How to use the Fuel Cost Calculator
- 1 Enter the distance in km.
- 2 Enter your car's fuel use in L/100 km.
- 3 Enter the price in cents a litre.
- 4 Optionally enter trips a week.
Worked example
A 300 km trip in a car that uses 8 L/100 km, with fuel at 195c a litre. The trip uses 24 litres and costs about $46.80, about 15.6c per km. Driving the same trip twice a week for a year would cost about $4,867 in fuel.
Features
Australian units
L/100 km and cents a litre.
Cost per km
Real running cost per kilometre.
Weekly and yearly
Commute costs over time.
When to use it
Road trips
Budget for a holiday drive.
Commuting
Compare driving with public transport.
Buying a car
Compare fuel costs of models.
Work travel
Estimate costs for reimbursement.
Frequently asked questions
How do I calculate fuel cost?
Litres = distance × L/100 km ÷ 100. Cost = litres × price.
What is a typical fuel use?
Small cars use about 6 to 7 L/100 km, SUVs 8 to 11 and utes 9 to 12.
Where can I find my car's rating?
The Green Vehicle Guide lists official fuel consumption figures.
Why do prices change?
Prices follow a weekly cycle in some capitals and track global oil prices and the dollar.
How can I save fuel?
Keep tyres inflated, avoid heavy loads and drive smoothly.
Can I claim car costs?
Work-related car costs can be claimed using the cents per km or logbook method.
What is the cents per km rate?
It is set each year by the ATO and covers all car running costs.
How do I split costs?
Divide the trip cost by the number of passengers.
Are EVs cheaper?
EVs often cost a few cents per km to charge at home.
Does air conditioning use more fuel?
Yes, a little, especially in city driving.
How do I measure my real fuel use?
Fill the tank, reset the trip meter, then divide litres at the next fill by kilometres and multiply by 100.
Do premium fuels save money?
Only if your car needs them; otherwise regular unleaded is cheaper.
Is diesel cheaper to run?
Diesel engines use less fuel, but diesel prices can be higher.
Does speed affect fuel use?
Yes. Driving at 110 km/h uses noticeably more than at 90 km/h.
What about hybrids?
Hybrids can use 4 to 5 L/100 km in city driving.
How do I estimate yearly fuel costs?
Multiply your weekly kilometres by 52, then use your fuel use and an average price. Many Australians drive about 12,000 to 15,000 km a year.
Results are estimates based on the official rates linked above. Confirm important figures with the issuing authority or a qualified adviser before you act on them.
Reviewed by ToolsUnlocked Team · Last updated