CALCULATORS
Change the example assumptions to match your driving. All amounts are in Australian dollars and all pump prices are in cents per litre.
For a household or a group of vehicles with the same average usage.
Litres/week = kilometres × L/100 km ÷ 100 × vehicles. Weekly cost = litres × c/L ÷ 100. Annual cost = weekly cost × 52. All vehicles share the same distance and consumption. Excludes maintenance, insurance, tolls and changes in driving conditions or price.
Enter the price and any eligible discount for the same fuel grade at two stations.
Effective price = pump price − eligible discount. Fill cost = litres × effective c/L ÷ 100. The difference is a gross saving before detours, card fees or qualifying purchases. Only include a discount if you meet its conditions. A discount cannot exceed the entered price.
Compare your potential fill saving against the fuel used on the additional return trip.
Gross saving = fill litres × price advantage ÷ 100. Detour fuel cost = extra return km × consumption ÷ 100 × fuel price ÷ 100. Net saving = gross saving − detour fuel cost. Break-even return km = gross saving ÷ fuel cost per km. Excludes your time, wear, tolls and idling; allow for those separately.