EV vs Petrol Calculator

About the EV vs Petrol Calculator

An EV vs petrol (gasoline) calculator compares the total cost of ownership and lifetime emissions of an electric vehicle versus a conventional internal combustion engine (ICE) car over any ownership period you specify. The comparison goes beyond sticker price to include fuel and electricity costs, maintenance savings, insurance differences, available tax incentives, and projected resale values. Electric vehicles typically have higher upfront purchase prices but significantly lower per-mile running costs — home charging at off-peak electricity rates costs approximately $0.03-0.05 per mile versus $0.10-0.15 per mile for a 30 MPG petrol vehicle at current fuel prices. This calculator shows exactly when (and whether) an EV pays back its purchase premium and how the break-even point changes with different electricity rates, fuel prices, and driving distances. It works for the US (with federal tax credit up to $7,500 under IRA 2022), UK, Canada, and Australia where EV incentives and electricity rates differ.

How It Works

Total cost comparison over 5 years: EV total cost = (Purchase price - incentives) + (Annual electricity cost x 5) + (Annual maintenance x 5). ICE total cost = Purchase price + (Annual fuel cost x 5) + (Annual maintenance x 5). Annual electricity cost = Annual miles x electricity cost per mile. At 4 miles/kWh and $0.12/kWh: $0.03/mile. At 12,000 miles/year: $360/year. Annual fuel cost for 30 MPG ICE at $3.50/gallon: 12,000 / 30 x $3.50 = $1,400/year. Maintenance savings: EVs average $700-900/year less in maintenance (no oil changes, less brake wear from regenerative braking, simpler drivetrain). Year 1 EV advantage: $1,400 + $800 - $360 = $1,840/year running cost advantage. Break-even on a $8,000 purchase premium: $8,000 / $1,840 = 4.35 years.

Tips & Best Practices

• ✓Home charging economics: the key to EV savings is home charging at off-peak electricity rates ($0.07-0.12/kWh overnight). Public DC fast charging at $0.30-0.50/kWh erodes most of the fuel cost savings versus petrol.
• ✓US federal tax credit (2024-2025): up to $7,500 for qualifying new EVs and $4,000 for used EVs (income limits and MSRP caps apply under the Inflation Reduction Act). This credit directly reduces your tax liability.
• ✓EV maintenance savings: no oil changes (saving $100-150/year), regenerative braking extends brake life by 50-100%, no transmission service, simpler cooling system. EVs average $700-900/year less in scheduled maintenance.
• ✓Battery degradation: modern EVs (post-2019) typically retain 80-90% of battery capacity at 100,000 miles. Most manufacturers offer 8-year/100,000-mile battery warranties.
• ✓Grid emissions matter for EV environmental benefit: in coal-heavy grid regions, an EV may have higher lifecycle emissions than a hybrid. In renewable-heavy regions (Pacific Northwest, California), the benefit is substantial.
• ✓Insurance: EV insurance typically costs 10-20% more than equivalent ICE vehicles due to higher repair costs for battery and electronic components. Factor this into your comparison.
• ✓Residual value: EV resale values have been volatile. The federal used EV credit ($4,000) and rapid new model releases creating faster obsolescence both affect resale — model this carefully for lease versus purchase decisions.
• ✓Charging infrastructure at home: Level 2 home charger installation costs $500-1,500 for the unit plus $200-800 for electrician work (if panel upgrade is not needed). Add this one-time cost to the EV side of the comparison.

Who Uses This Calculator

Car buyers evaluating whether an EV makes financial sense for their specific driving patterns and electricity rates. Fleet managers comparing 5-10 year TCO for vehicle replacement decisions. Environmental advocates calculating the true emissions benefit of EV adoption in different grid regions. Financial advisors helping clients make large purchase decisions with full cost transparency. Policy researchers modelling consumer EV economics under different incentive scenarios.