EV vs Petrol/Diesel Cost Comparison Calculator

See the real pound-for-pound difference between charging an EV at home and running a petrol or diesel car, for the same weekly mileage.

Electric car

Efficiency (miles/kWh)

Electricity tariff

Petrol / diesel car

Fuel type

Fuel economy (mpg)

Mileage

Weekly mileage (used for both cars)

Weekly running cost

Electric (home charging)—

Petrol—

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Saved per week

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Saved per month

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Saved per year

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Cheaper per mile

A note on fairness

This compares fuel/energy cost only — it doesn't include purchase price, depreciation, servicing, insurance or the EV off-peak tariff's higher daytime rate on the rest of your household electricity. It's a running-cost-per-mile comparison, which is the number most people actually want when deciding whether to switch.

Estimates only, based on figures current as of . See About & Sources.