Monthly fuel expense calculator
Monthly and yearly fuel cost from your distance, mileage and the fuel price.
Need the current price? See the petrol & diesel price page.
How it's calculated
Litres = km ÷ km/L. Cost = litres × price.
- Real-world mileage varies with traffic and AC use
Version 1.0 · exact decimal maths · inputs are not stored.
Questions
What fuel average should I use?
Your real-world average from a full-tank test is best: fill up, reset the trip meter, drive normally, then divide km by litres at the next fill.
Where do I get the fuel price?
Use the latest notified price for your grade; our petrol price page shows it once a verified notification is on file.