EV vs Petrol Calculator — measure your ev vs petrol impact. Evidence-based formula with reduction tips.
Annual EV running cost = (Annual mileage ÷ Miles per kWh × Electricity price) + Insurance + Servicing + Road tax
Total cost over N years = Purchase price + (Annual running cost × N). The break-even year is where EV cumulative total equals petrol cumulative total.
Worked example: EV costs £40,000, petrol costs £25,000. EV running: (10,000 ÷ 3.5) × £0.24 + £1,200 + £200 + £0 = £686 + £1,400 = £2,086/yr. Petrol running: (10,000 ÷ 40 × 1.609 × £1.50) + £900 + £600 + £180 = £604 + £1,680 = £2,284/yr. EV saves £198/yr running costs; break-even = (£40k−£25k) ÷ £198 = 75 years — purchase price gap dominates here. A smaller gap (e.g., EV £30k vs petrol £25k, saving £1,200/yr running) breaks even in 4 years.