See how much you can save every year by switching from petrol or diesel to an electric vehicle. Our calculator compares your fuel costs, mileage, and energy prices to show real-world savings.
Switching to an electric car isn’t just good for the planet — it’s often a smart financial move too. With fuel prices fluctuating and electricity costs becoming more competitive, many UK drivers are discovering that driving electric can significantly reduce their running costs.
Our partner, Ayvens, have developed an Electric Car Fuel Cost Savings Calculator which makes it easy to see exactly how much you could save. Simply choose your electric car from the list and the calculator will automatically find its battery capacity and official range. You can enter your own electricity rate or use the current UK average as a guide. The same applies for your petrol or diesel price per litre, and your vehicle’s fuel efficiency (in miles per gallon). Add your annual mileage and the calculator will instantly work out the cost per mile, per month, and per year for both your current car and the electric model you’ve chosen.
This gives you a clear, side-by-side comparison of the real-world costs of driving electric versus staying with your petrol or diesel vehicle. It’s the quickest way to understand your potential savings — and in many cases, drivers are surprised to find just how affordable electric motoring has become.
The calculator takes into account national average figures, so if you don’t know your exact rates or MPG, you can still get an accurate estimate. It also allows you to customise every input, meaning you can experiment with different mileage levels, energy tariffs, or car models to see how your potential savings change.
Electric cars generally have lower running costs because electricity is cheaper per mile than petrol or diesel, and there are fewer moving parts to maintain. When you combine those savings with lower Vehicle Excise Duty, reduced congestion charges, and home charging convenience, it’s easy to see why more UK drivers are making the switch every year.
Our aim is to give you a realistic picture of what you’ll spend — and what you’ll save — before making a decision. Whether you’re looking at your first electric car or comparing specific EV models, our calculator gives you a transparent, data-driven answer in seconds.
The calculator uses verified UK data for electric vehicle efficiency, average fuel prices, and electricity costs. While your actual results may vary depending on your tariff, driving habits, and local fuel prices, the figures provide a reliable and realistic estimate of your potential savings.
For reference, the tool uses the current UK national average electricity cost per kWh and the average price of petrol and diesel per litre. These are updated periodically to reflect the latest UK energy and fuel market data.
Yes. You can enter your exact home electricity tariff and local fuel costs to get personalised results. If you don’t know them, simply leave the default national averages in place.
At the moment, the calculator focuses purely on fuel and energy costs. However, electric cars generally require less maintenance, so your real-world savings could be even higher.
Electric vehicles are more energy-efficient, converting a higher percentage of stored energy into motion compared with internal combustion engines. Electricity is also taxed differently and priced more stably than petrol or diesel, meaning your per-mile cost is significantly lower.
With more affordable EV models, improved battery ranges, and expanding UK charging infrastructure, many drivers find the switch worthwhile. Beyond financial savings, electric cars offer smoother driving, zero tailpipe emissions, and exemption from certain charges such as London’s ULEZ and congestion zone fees.