What does this tool do?
The running-cost gap between an electric and a petrol car depends on distance, efficiency and local energy prices. This calculator compares annual energy spend and shows where the EV saves money, without counting purchase price or depreciation.
The Formula
EV cost = km ÷ 100 × kWh/100 km × $/kWh; Petrol cost = km ÷ 100 × L/100 km × $/litreFrequently Asked Questions
Are EVs always cheaper to run?
Usually they are cheaper per kilometre, especially with home charging. The advantage shrinks with expensive public charging, very low annual mileage or a petrol car that is already highly efficient.
Should I compare total cost of ownership instead?
Yes for a purchase decision. Fuel is only one part of the picture; depreciation, insurance, servicing and resale value often matter more over five years.