Formula: Petrol cost = (monthly km ÷ mileage) × petrol price. EV cost = (monthly km × efficiency ÷ 100) × electricity tariff. Savings = petrol cost − EV cost.

Assumes home/off-peak charging at the tariff you enter — public fast charging is usually more expensive per unit. EV efficiency varies by vehicle, driving style and climate; check the specific vehicle’s page for its variant-level figures where available.