Fuel & trip cost calculators
17 calculators, each built around a decision someone actually has to make rather than a formula someone might want to look up.
Three things are consistent across all of them. Every calculator shows the formula it applies and states its assumptions on the page, so you can check whether the model fits your situation before trusting the number. Every one defaults to the current Australian five-city fuel price — 200.7 cpl for unleaded and 243.9 cpl for diesel as at 19 August 2026, from our fuel price data — and every one lets you override it, which you should. And all of them run in the browser with nothing stored on a server and no sign-up.
If you are unsure which to start with: use trip fuel cost for a specific journey, fuel budget planner for recurring spend, and the comparison tools under Vehicles when you are deciding between two vehicles rather than costing one you already own.
Marine
Read the marine guideFuel on the water is a safety calculation before it is a budget one. These apply a reserve margin by default rather than reporting theoretical range.
Towing & caravans
Read the towing & caravans guideTowing changes consumption by a percentage, not a fixed amount, and the percentage is driven by frontal area far more than mass.
Trip planning
Read the trip planning guidePer-trip costs, one-off or recurring. All of these take a fuel price you can override — the default is the current five-city average.
- Trip Fuel CostWhat will this specific drive cost in fuel, there and back?
- Drive vs FlyFor this group and this distance, is driving actually cheaper than flying?
- Fuel Budget PlannerWhat should I set aside for fuel each week, month and year?
- Commute Fuel CostWhat is the daily drive costing me over a working year?
- Carpool Fuel SplitWhat is each passenger's fair share, including partial legs?
Vehicles
Read the vehicles guideRunning-cost comparisons. Break-even answers here depend heavily on annual distance — enter yours rather than accepting a default.
- Motorcycle Fuel CostWhat does riding this instead of driving save on fuel?
- Fuel Economy & ConsumptionWhat is a given improvement in L/100km actually worth per year?
- Hybrid vs PetrolHow long does it take fuel savings to repay the hybrid premium?
- EV vs PetrolOver five or ten years, which is cheaper once servicing and insurance are in?
- EV Charging CostWhat does a charge cost at home versus on a public DC charger?
- Hydrogen vs PetrolAt current hydrogen pricing, how does a fuel-cell vehicle compare?
- Idling Fuel WasteWhat is idle time costing across a year or a fleet?
Commercial & fleet
Operator-side tools for people who buy fuel as a business input rather than a household one.