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🚗 Budget & Living

Fuel Cost Calculator

Work out how much fuel a trip will cost from the distance, your car's economy and the petrol price.

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Total Fuel Cost
Fuel Used
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Total Distance
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Cost per km
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Fuel Price
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About This Fuel Cost Calculator

This free fuel cost calculator estimates how much petrol or diesel a trip will cost. It multiplies your distance by your car's fuel economy (litres per 100km) to find the fuel used, then multiplies by the price per litre. Choose one-way or return for the total trip.

This is general information only. Real fuel use varies with driving style, traffic, load and conditions. It does not include tolls, parking or vehicle wear.

Frequently Asked Questions

How is the fuel cost of a trip calculated?+
Distance × fuel economy (L/100km) ÷ 100 gives the litres used. Multiply that by the price per litre to get the cost.
What is a typical fuel economy figure?+
Small cars use roughly 6–8 L/100km, mid-size cars 7–9, and larger SUVs 9–12. Check your car's official combined figure or your own trip data.
Does this include other car costs?+
No — this covers fuel only. For total ownership costs including insurance, rego and servicing, use the Car Running Cost calculator.

Related Tools

→ Car Running Cost→ Car Loan Calculator→ Budget Planner