Free calculator

Find your leak

Put in a few numbers about your vehicles. See what idling and chasing drivers by phone cost you each month, and which leak to plug first.

Find my leak
Vehicles Kilometres per vehicle each week km Fuel type Fuel price per litre $

National average for the week ending 1 November 2026, from the Australian Institute of Petroleum. Change it to what you pay.

Fuel use per 100 km L

Australian average for utes and vans, from the ABS. Change it to your vehicles' figure.

Minutes each vehicle idles a day min

Engine running, vehicle not moving. Your best estimate.

Hours a week spent ringing drivers hours Do staff use the vehicles privately?

Fill in your numbers, then choose Find my leak.

Your monthly leak appears here straight away.

How we calculate your leak

Fuel burnt idling

Vehicles, times the hours each one idles a day, times 1.8 litres an hour, times your fuel price. We then multiply by 5 days a week and 52 weeks.

Time spent ringing drivers

The hours a week you spend on the phone to drivers, times $54.83 an hour, times 52 weeks. The hourly cost is the Australian Bureau of Statistics average full-time weekly earnings of $2,083.70, divided by a 38-hour week.

Monthly and yearly figures

Each monthly figure is the yearly figure divided by 12. The total adds the two leaks together.

Your fuel bill

Vehicles, times kilometres a week, times fuel use per 100 km, times your fuel price, times 52 weeks. We use it only for the fuel saving in the examples.

Private use

If staff use the vehicles privately, we list FBT logbooks by hand but never add them to the total, because we found no published time or tax rate to price them.

What we assume

We assume each vehicle runs 5 days a week. That is our assumption, not a published figure. Your own pattern may differ.

Sources and further reading

Your questions

Questions about your leak.

It is an estimate from the numbers you enter, so it is only as accurate as those numbers. Fuel price, fuel use and the cost of staff time come from published Australian sources, each dated in the method section. Idle minutes and phone hours are your best estimate, and we assume each vehicle runs 5 days a week. Change any figure to match your own.

The Australian Institute of Petroleum publishes the national average retail price every week. The calculator starts with the week ending 1 November 2026: 280.1 cents a litre for diesel and 237.4 cents for petrol. Change it to the price you pay.

About 1.8 litres an hour for a light vehicle. That is the Natural Resources Canada figure of 0.6 litres an hour for every litre of engine size, applied to a 3-litre engine. A smaller engine burns less and a larger one burns more.

We found no published Australian figure for the cost of a late service or breakdown, so the calculator leaves it out rather than guess. IntelliTrac books servicing on real kilometres and engine hours, so vehicles stay on the road. One example result: downtime down 20%.

From $12 a vehicle a month. Choose Reveal my price on this page, tell us how many vehicles you have and what matters most, and we'll give you your price.

Plug the leak, keep the money.

IntelliTrac shows idle time for every vehicle and puts every vehicle live on one map. From $12 a vehicle a month.

Book a demoFind my leak

IntelliTrac provides fleet, telematics and field-operations software in Australia. Call 1300 767 492.