Electric Vehicle Savings Calculator

Use this calculator to get a quick, personalized comparison of how much it will save you yearly if you switch to an electric vehicle.

Thinking about switching to an electric vehicle (EV) but not sure how much money you’ll actually save compared to petrol? Just enter the details,and energy costs to see how much you spend on petrol vs electricity each year, and how much you could save by going electric.

How the Calculator Works

This calculator estimates your yearly driving costs for petrol and EVs based on your inputs. Here’s a breakdown of the fields and what they mean:

• Miles per day (Weekdays & Weekends):
  Enter how many miles you usually drive on weekdays and weekends. The calculator works out your total yearly mileage using these numbers.
• Miles per gallon (MPG):
  This is your car’s fuel efficiency. You can find your exact MPG in your car manual, on websites like Fuelly, or from your vehicle’s onboard computer. The calculator uses this to work out how many gallons of petrol you’ll use in a year.
• Petrol cost per gallon (£):
  By default, this is set at £6.13 per UK gallon (4.55 litres), which is the average UK petrol price. You can adjust this if fuel prices in your area are higher or lower.
• Miles per kWh (EV Efficiency):
  This shows how many miles your EV can drive on one kilowatt-hour of electricity. On average, EVs manage about 3.5 miles per kWh, but you can enter your own figure if you know your car’s rating.
• Electricity cost per kWh (£):
  The average UK electricity price is currently around £0.2635 per kWh, but this varies depending on your supplier and tariff. You can update this field with your exact price per kWh.
  For a full breakdown of electricity prices in your region, check this helpful guide: Compare UK electricity prices per kWh.

Once you fill in these fields, just hit “Calculate Savings” and you’ll instantly see:

✅ Total yearly miles
✅ Yearly petrol cost (and cost per mile)
✅ Yearly EV cost (and cost per mile)
✅ The difference in costs — i.e. your potential yearly savings by going electric.

Example

Let’s say you drive 30 miles a day on weekdays and 50 miles a day on weekends. That works out to around 11,440 miles per year.

• Petrol car (35 MPG, £6.13 per gallon):
  Uses about 327 gallons per year, costing roughly £2,004 (about £0.18 per mile).
• Electric car (3.5 miles per kWh, £0.2635 per kWh):
  Uses about 3,268 kWh per year, costing around £861 (about £0.07 per mile).

In this case, driving electric saves you over £1,100 per year in fuel costs alone.

Why This Matters

Fuel is one of the biggest costs of owning a car. Petrol prices have been rising, while EV charging , especially at home, overnight can be much cheaper. Knowing your yearly fuel vs charging costs helps you:

• Budget your driving costs more accurately
• Compare petrol cars vs EVs before buying
• See how much you could save switching to electric
• Understand the impact of electricity tariffs and fuel prices

FAQs

🔹 Do EVs always save money compared to petrol cars?
Most of the time, yes — especially if you charge at home overnight with cheaper electricity tariffs. Public rapid charging can be more expensive per kWh, so your savings depend on your charging habits.

🔹 How accurate are these results?
The calculator gives an estimate based on your inputs. Actual costs may vary depending on your driving style, road conditions, fuel prices, and your car’s efficiency.

🔹 What’s the average electricity price per kWh in the UK?
Currently, it’s around 26.35p per kWh, but it changes often. You can check check online to get the latest rates in your region.

🔹 Can I use this for hybrid cars?
Yes, but you’ll need to make separate calculations for the petrol and electric parts. This tool is best for comparing a pure petrol car vs a pure EV.

🔹 What about maintenance and other costs?
This calculator focuses only on fuel vs electricity. But in general, EVs also save money on servicing (fewer moving parts, no oil changes) and can benefit from tax incentives and lower running costs.