Fuel Cost Calculator Australia
Fuel cost for any trip — instantly.
Last updated: January 2025 · Built for the 2024–25 financial year
Inputs
Results
Litres needed
40.0 L
Total cost
$74.00
Cost per km
$0.15
Results are estimates only. For financial advice, consult a licensed adviser.
Overview
Trip and weekly fuel costs in litres-per-100-km
Australia's standard fuel-economy unit is L/100km — the lower the number, the more efficient the vehicle. The ADR 81/02 sticker on every new car shows combined city/highway figures, but real-world consumption is typically 10-25% higher.
Ethanol blends (E10, 91/94 RON) reduce energy density by 3-4%. Premium 95/98 RON is only worth it for engines designed to use it.
Formula
Trip cost
litres = distance(km) × consumption(L/100km) / 100 cost = litres × price($/L)
Worked example
350 km trip, 7.5 L/100km, $1.95/L unleaded
- Litres = 350 × 7.5 / 100 = 26.25 L.
- Cost = 26.25 × 1.95 = $51.19.
Answer: $51.19 fuel for the trip
Pro tips
- •Tyre pressure 10% low = 2-3% fuel penalty.
- •FuelMap, 7-Eleven app and Servo apps surface the cheapest stop.
- •Cruise control on highway saves 3-7%.