MPG calculator
Real miles per gallon from two odometer readings and one fill-up — the full-tank method, which is what your dashboard is not doing.
Running costsCost per mile calculator
Fuel, maintenance, insurance, registration and depreciation, added up and divided by the miles you actually drove.
Upkeep budgetMaintenance cost calculator
Routine service, consumable wear items, and unscheduled breakdown reserves calculated bottom-up from your vehicle's age, class, and mileage.
Unit conversionL/100km to MPG converter
Two-way live converter between metric L/100km, US MPG, UK Imperial MPG, and km/L with instant fuel cost comparisons.
Tesla TelematicsTesla battery health calculator
How to check battery health on Tesla: audit battery degradation curves, state of health (SoH), and 70% warranty threshold buffer with fleet benchmark curves.
Electric vehiclesEV charging cost calculator
Cost to charge a Tesla at home vs public Superchargers, off peak electricity times, gas fuel comparison, and 5-year ownership savings.
Where the numbers come from
All calculators use your own figures and nothing else. If you want the reasoning rather than the result, the guides behind them are how to calculate MPG by hand, what your car actually costs per mile, average car maintenance cost per year, and our EV & Tesla intelligence guide for battery degradation curves and charging economics. For manufacturer figures on a specific car, the fuel economy database covers 1,782 models.