Fuel Log & Consumption Tracker
Log every fill-up and get your real fuel consumption: L/100 km and mpg between full tanks, cost per kilometre, average fuel price, best and worst tanks and CO₂ — all stored privately on your device.
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Fill to full, then measure
The only accurate method is the full-to-full one: fill the tank to the top, note the odometer, drive normally, then fill to the top again. The litres you add divided by the kilometres driven give the real consumption. Partial top-ups in between are carried over to the next full tank.
- Fill the tank to full at each measurement
- Record the odometer, not the trip meter
- L/100 km = litres ÷ km × 100
- MPG (UK) = 282.48 ÷ (L/100 km)
What the numbers really tell you
Consumption alone is only half the story. Cost per kilometre combines consumption and the price you actually paid, and the average price per litre shows whether you are buying at good stations. Watching best and worst tanks reveals how much driving style, season and load change your bill.
- L/100 km — fuel efficiency
- Cost per km — the real running cost
- Average price /L — your fuel-buying habits
- Best vs worst tank — driving style and season
Why it beats the trip computer
On-board computers are often optimistic by 5 to 15%. A real log uses the actual litres from the pump and the actual kilometres, so it is the only figure you can trust for budgeting, comparing a repair or checking whether a fault (or a new driving route) changed your consumption.