Calculators for car owners
Everyday arithmetic that usually happens on a phone notepad. Counts as you drag — nothing is sent to any server.
Two of these four answer questions people usually settle by guesswork. Fuel consumption from a single fill-up is honest only if both fills went to the same click of the pump handle and the car stood on level ground: half a litre of difference on a 400-kilometre run shifts the figure by a tenth. Payback for an adapter compares its price with one diagnostic session at a garage — it does not count the times you drove there and back for nothing.
The unit converter is here for a different reason: gauges and scan tools speak different languages. A car shows coolant temperature in degrees, the manual quotes pressure in bar, and an app may report the same pressure in psi or kPa — the numbers look wrong until they are converted. Nothing on this page is sent anywhere: everything is worked out in the browser.
Fuel consumption
Fill the tank, drive, fill it again to the same click — the distance between fills and the litres you put in are all it takes.
Gauge units
Adapters and manuals mix metric and imperial. Type in any field — the rest follow.
MPG here is the US gallon — the one American manuals use.
Adapter payback
One trip to read the codes usually costs more than the adapter. Set your own numbers.
Next service
By mileage, and roughly by date if you know your monthly average.
The interval is the one from your car's manual, not ours: for the same engine it differs between markets. The app can reset the service counter itself — where the car allows it.