At-home charging
EV charging cost calculator
Find out how much it costs to charge an electric car at home, including energy lost between the wall and the battery.
Your charge
Calculate a home charge
Use usable battery capacity where it is published and the unit rate—not the standing charge—from your bill.
Public rapid charging uses a different tariff. This calculation is for home electricity.
What changes the cost
Battery added is not energy bought.
A charge from 20% to 80% adds 60% of the battery's capacity. The wall supplies slightly more because charging creates heat and powers the car's electronics.
| Battery | 20–80% added | From wall at 90% | Cost at 24.5p |
|---|---|---|---|
| 40 kWh | 24 kWh | 26.7 kWh | £6.53 |
| 60 kWh | 36 kWh | 40.0 kWh | £9.80 |
| 80 kWh | 48 kWh | 53.3 kWh | £13.07 |
Cold weather, battery conditioning and charger type can affect efficiency. Off-peak EV tariffs can reduce the cost when charging is scheduled overnight.
Common questions
EV charging answers.
How much does it cost to charge an electric car?
Multiply the energy drawn from the wall by your tariff. A 60 kWh battery charged from 20% to 80% at 90% efficiency draws about 40 kWh.
Should I use total or usable battery capacity?
Use usable capacity where available. It represents the energy the car normally lets the driver access.
Does charger speed change the cost?
At home, the electricity tariff and efficiency matter more than speed. Public networks usually apply their own price per kWh.