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Estimate the electricity your EV will use each year and compare charging at home with a public-charging rate. Change every input to match your car and tariff.
The 26.11p default is the Ofgem average direct-debit price-cap electricity rate for 1 July to 30 September 2026. Replace it with your actual tariff.
Your estimate
Electricity drawn
2,514 kWh
Home charging
£656
Public charging
£1,886
Difference
£1,229
At these example rates, charging at home is £1,229 less per year than the public rate entered.
Annual miles are divided by vehicle efficiency. The loss allowance estimates extra electricity drawn during charging, then the total is multiplied by each unit rate.
Divide annual miles by the vehicle efficiency in miles per kWh, then multiply the resulting kWh by your electricity unit rate. This calculator performs that calculation and compares it with a public-charging rate.
Use the pence-per-kWh rate shown on your tariff. If you use a cheaper EV or off-peak window, enter the rate that applies when the car will normally charge.
Yes. The default adds 10% to the energy drawn from the wall to provide a more realistic planning estimate. Actual losses vary by vehicle, temperature and charging equipment.
No. It estimates electricity usage only. Use the installation-cost guide for the typical hardware and fitting range.