Free Gas vs EV Cost calculator with clear step-by-step results.
Compares the running cost of the same annual distance on petrol against electricity, then adds the maintenance difference - no oil changes, no filters, far less brake wear. The per-kilometre gap is the durable number, because it stays valid as annual distance changes.
Petrol cost
Cost = km x (L/100km) / 100 x price per litre
EV cost
Cost = km x (kWh/100km) / 100 x price per kWh
Only if you charge at home. Public rapid charging often costs two to four times a domestic tariff, which can erase most of the saving for drivers without off-street parking.
Not included - this is running cost only. Compare the annual saving against the price premium to see how many years the premium takes to recover.