Electric Car Savings Calculator
Discover how much you could save by switching to an electric vehicle. Compare annual fuel costs, 5-year savings, and CO2 emissions against your current petrol or diesel car.
Calculate Your EV Savings
Enter your current driving habits and vehicle details to see a realistic breakdown of the financial and environmental benefits of going electric.
Vehicle & Usage Details
Enter your current car and EV estimates
Savings Evaluation
Estimated financial and environmental impact
UK Running Cost Comparisons
Standard benchmarks for evaluating electric vehicle efficiency against internal combustion engines.
| Metric | Petrol / Diesel Car | Electric Vehicle (EV) |
|---|---|---|
| Average Efficiency | 35 – 45 MPG | 3.5 – 4.5 miles per kWh |
| Average Fuel/Energy Cost | ~£1.45 per litre | ~24p per kWh (Home) |
| Cost per Mile (Average) | ~15p – 18p | ~6p – 8p (Home charging) |
| CO2 Emissions | ~150g – 180g per km | ~50g per km (UK Grid Mix) |
| Annual Maintenance | Higher (oil, filters, brakes) | Lower (fewer moving parts) |
Electric Car Savings FAQ
Everything you need to know about the costs and benefits of switching to an electric vehicle.
On average, UK drivers can save between £800 and £1,200 per year on fuel costs alone by switching from a petrol or diesel car to an electric vehicle, depending on annual mileage and home charging availability.
MPG (miles per gallon) and miles per kWh measure different things. A typical efficient EV achieves around 3.5 to 4.5 miles per kWh. To compare costs, calculate the cost per mile: (Fuel price per litre × 4.546) ÷ MPG for petrol/diesel, and (Electricity price per kWh) ÷ miles per kWh for an EV.
It is significantly cheaper to charge an EV at home using a standard domestic tariff or an EV-specific overnight tariff (often 7p–15p per kWh). Public rapid chargers typically cost between 45p and 85p per kWh, which can erase the financial savings of driving electric.
Yes. Even when accounting for the UK’s electricity grid mix, an average EV produces roughly 60-70% less CO2 over its lifetime compared to a new petrol or diesel car. As the grid becomes greener, this advantage continues to grow.