Guides for drivers
How to work out fuel economy, running costs and maintenance, with or without an app.
How to calculate your car's MPG
Calculate miles per gallon with the full-tank method: miles driven divided by gallons added. Worked examples, partial fill-ups, tank level and US vs UK gallons.
How to calculate fuel consumption in l/100 km
The l/100 km formula with worked examples: liters used ÷ kilometers driven × 100. Plus km/l, converting to MPG and handling partial fill-ups.
How to track car expenses
A simple system for tracking car expenses: what to record, which categories to use, how to handle receipts and how to turn it all into monthly totals.
How much does your car cost per mile?
Work out your car's real cost per mile or kilometer: add up a year of fuel, insurance, service and fees, divide by distance. Worked example included.
How to calculate the fuel cost of a road trip
Trip fuel cost = distance ÷ MPG × price per gallon. Worked examples in miles and kilometers, plus how to make the estimate realistic.
How to track LPG consumption in a bi-fuel car
Track LPG (or CNG) and gasoline separately in a bi-fuel car: log each tank on its own, calculate l/100 km per fuel and compare the real cost per kilometer.
How to keep track of oil changes and car maintenance
Set maintenance reminders by mileage and by date, whichever comes first. Which services to track, how to keep the odometer current and how to log the work.
How to find cheaper gas prices near you
Find cheaper gas without wasting the savings on detours: compare gas prices on a map, know your area average and fill up where you already drive.
How to track fuel consumption
Track your car's fuel consumption in four steps: fill to full, note the odometer, repeat, then divide. What to record, how often and which tool to use.
How to calculate mileage (km/l) of a car or bike
Mileage in km/l is distance driven divided by fuel used. Worked examples for a car and a bike, plus conversions to l/100 km and MPG.