EV charging cost calculator

Estimate the electricity and cost of charging your EV over a year, an average month and each mile. Compare your entered charging mix with charging entirely at home or at the public rapid price. These alternatives use the same driving distance and vehicle efficiency.

Enter annual miles and vehicle efficiency in miles per kWh. Add charging losses, the share charged publicly and the public price. For home charging, choose a published electricity rate or your bill price. Enter the share of home energy charged off-peak and its price. Use zero for a charging share you do not use.

Metered charging energy = annual miles ÷ miles per kWh ÷ (1 − charging loss share). Blend the home bill and off-peak prices using the share of home charging, then blend with the public rapid price using the public share. Monthly cost is one twelfth of annual cost. Charger loss and efficiency must describe the same basis.

Use a percentage as a fraction once: for example, 50% means 50 ÷ 100 = 0.5. Use 0.5 in the energy formula; do not divide it by 100 again.

The public share applies to all metered charging energy. The off-peak share applies only to the home part. For example, half of home charging off-peak does not mean half of all charging is off-peak when some energy is bought publicly. The rest of the home part uses the selected home rate.

Convert unit prices in pence per kWh to pounds by dividing by 100. Charging losses increase the energy bought above the energy used for driving. Check whether the efficiency figure already includes those losses. Adding losses again would count them twice. The cost per mile divides the yearly cost by the same annual mileage.

These illustrative inputs are separate from your saved answers. Prices, use and performance are held constant for this worked scenario; they are not personal defaults.

Use a driving efficiency that fits the vehicle and the conditions you want to compare. A dashboard figure, charger record and published rating may cover different measurement points. Keep the efficiency and loss figure on a matching basis. The tool does not predict changes caused by weather or driving style.

The yearly illustration repeats the entered mileage, charging shares and prices. An average month is one twelfth of the year, rather than a prediction of the next bill. Change the public share or off-peak share to compare another routine while keeping the other assumptions the same.

This result covers charging energy. It does not add vehicle purchase, repairs, insurance, parking or charger installation. Session fees and memberships are outside the entered unit prices unless you have included them in a price. Displayed money is rounded; the calculation retains full precision. Empty personal fields are not guessed.

Published UK home electricity prices use the selected Ofgem region and payment method. Stored prices include the tax treatment recorded for their period. Public rapid and off-peak prices are your own inputs. Enter tax-inclusive prices that match the charger or tariff you intend to use.

Existing household standing charges are excluded from this extra charging cost. A published flat rate does not describe every time-of-use tariff. Check the actual charging windows and prices on your plan. Dated sources identify the stored records and method; they do not verify a personal charger quote or future electricity prices.

Have a competent electrician install the charging equipment and confirm the required network notification. Follow the charger and vehicle instructions. A low energy cost does not confirm that a particular charger suits the property.

Ask the vehicle maker or an energy adviser if your efficiency or loss figures cover an unclear measurement point. Take charger records, bills and the vehicle’s stated units. Ask the installer about connection limits and installation costs before relying on a charging plan.