UK EV Tool · 100% Free

Free EV vs Petrol
Savings Calculator

See how much you could save by switching from petrol to electric — get your personalised estimate in seconds.

  • Instant cost comparison — results in under 60 seconds
  • Based on current UK electricity & fuel prices
  • No personal details required — fully anonymous
Is EV cheaper than petrol?
Blue electric car
EV vs Petrol Savings Calculator
Free Savings Calculator

EV vs Petrol
Savings Calculator

Compare the true cost of charging an electric vehicle at home against running a petrol car — and see exactly how much you could save.

£
Average UK EV Saving
~£1,200 / yr
Typical EV Efficiency
3 – 4 mi / kWh
UK Off-Peak Rate
~7 – 10p / kWh
Electric Vehicle
Distance & charging details
Miles Driven
Enter how far you typically drive. Choose whether that figure is per week or per month.
mi
Please enter a distance greater than zero.
EV Efficiency
How many miles your EV travels per 1 kWh of electricity. Most electric cars manage 3–4 mi/kWh. Check your vehicle handbook or use the default.
mi / kWh
Typical range: 2.5 – 5 miles per kWh
Please enter a valid efficiency value.
How Do You Charge?
Off-peak tariffs offer cheaper overnight electricity — often 7–10p/kWh. If you're not sure which tariff you're on, check your energy bill or supplier app. If unsure, we'll use UK typical figures.
Off-Peak Rate
The cheaper overnight electricity rate on your tariff. Many UK EV tariffs offer 7–10p/kWh off-peak.
£ / kWh
Please enter a valid rate.
Off-Peak Hours / Day
How many hours of cheaper electricity your tariff provides each day. Many UK off-peak EV tariffs offer between 4 and 7 hours overnight. Check your tariff documents if unsure.
hrs
Check your tariff documents — typically 4 to 7 hours overnight
Please enter a value between 0 and 24.
Standard Rate
Your normal electricity price per kWh. You'll find this on your energy bill or your supplier's app.
£ / kWh
Please enter a valid rate.
Using typical UK estimates: off-peak rate of 8p/kWh for 5 hrs overnight, with 28p/kWh for remaining daytime charging.
Petrol Car
Current fuel costs
Weekly or Monthly Petrol Spend
How much do you typically spend on petrol? Check your last few bank statements for an accurate figure.
£
Please enter a valid petrol spend.
How the calculation works
1

We calculate the kWh of electricity your EV needs based on your weekly mileage and efficiency.

2

Your tariff settings determine the split between cheap off-peak and standard-rate charging hours.

3

We compare your EV charging cost against your petrol spend to show your weekly, monthly and yearly savings.

No sign-up required
100% free
Instant results

Your Results

—
Electric
EV Charging Cost
—
per week
Petrol
Petrol Cost
—
per week
Saving
Weekly Saving
—
per week
Saving
Monthly Saving
—
per month
Cost Per Mile
EV vs Petrol — Cost Per Mile Comparison
EV cost
—
per mile
Petrol cost
—
per mile
Annual Saving
—
per year
—

Charge your EV using solar energy and your running costs could fall even further — potentially near zero on sunny days. Solar self-consumption can reduce charging costs by 30–60%.

Calculate Solar Savings
Based on UK tariff data
Smart charging formula
No data stored or shared
Fully private — runs in your browser

Estimates based on your inputs. Actual savings vary by vehicle, driving style and tariff. For guidance only — not financial advice.

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