How much does driving really cost you?
Compare fuel prices, see your real annual cost, and understand how price changes hit your wallet.
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How to Calculate Your Petrol Costs in Australia
Understanding your fuel costs is essential for budgeting, especially with fluctuating petrol prices across Australia. Our free petrol price calculator helps you compare fuel costs per kilometre for both city and freeway driving, estimate trip costs, and see exactly how price changes at the bowser affect your wallet.
Cost Per Kilometre Formula
To calculate your fuel cost per kilometre, divide your vehicle's fuel consumption (L/100km) by 100, then multiply by the price per litre. For example, if your car uses 8.2 L/100km and petrol is 189.9 c/L, your cost per kilometre is $0.1557.
City vs Freeway Fuel Consumption
Most vehicles consume significantly more fuel in city driving compared to freeway driving. Stop-start traffic, idling at lights, and frequent acceleration can increase fuel consumption by 20-30%. Enter both your city and freeway consumption figures to see the real difference in cost per kilometre.
Why Petrol Prices Change
Australian petrol prices are influenced by international oil prices, the AUD/USD exchange rate, wholesale margins, and the fuel excise tax. Prices often follow a price cycle in major cities, rising sharply then gradually falling over several weeks. Comparing old and new prices helps you understand the real dollar impact on your driving costs.