Global calculator · Energy bills & appliances

Home EV Charging Cost Calculator

Vehicle battery energy and electricity drawn from the wall are not identical. This calculator exposes charging efficiency, then reports grid kWh, cost and cost per 100 km or 100 miles using your own rate and distance. It is a home-charging energy estimate, not a public-charger quote, fuel comparison or claim about a specific vehicle model.

No account Formula visible Your rate and units

Use your evidence

What to have beside you

Use the current bill or tariff sheet, exact product label, location-specific solar estimate, or measured project dimensions. Example physical values teach the tool; zero money rates prevent an unsourced price from becoming a default claim.

USUSA GBUK AUAustralia AEUAE CACanada EUEU NZNew Zealand SGSingapore

Enter your details

Your values

Every input includes a simple explanation.

Simple wordsFormula shownPrivate inputs

Simple viewUsing editable example assumptions for technical settings.

Battery energy added per sessionUser-entered value — example shownThe battery energy added to the vehicle in one charging session.

kWh

Wall-to-battery efficiencyUser-entered value — example shownThe percentage of electricity from the wall that reaches the vehicle battery after charging losses.

Charging sessionsUser-entered value — example shownHow many charging sessions you expect during the selected period.

sessions

Home energy rateUser-entered value — example shownThe price you pay for one kilowatt-hour of electricity. Copy it from your own bill or tariff sheet.

USD/kWh

Distance coveredUser-entered value — example shownThe distance you expect to drive during the comparison period.

Distance displayUser-entered value — example shownThe unit in which you want the final result shown.

CurrencyUser-entered value — example shownThe currency used on your bill or quote. It changes the symbol, not the formula.

Helpful tip: Choose the currency printed on your bill or quote. No exchange-rate conversion is performed.

Private: calculations run in your browser; a saved scenario stays on this device.

Your result

Home charging cost

$0.00

Wall energy includes the entered charging loss. The result describes home electricity only, not public-charger pricing or total vehicle ownership cost.

Battery energy added320 kWh

Electricity from wall363.64 kWh

Cost per 100 km$0.00

Charging losses43.64 kWh

How this was calculated

Formula used

Grid energy = battery energy added × sessions ÷ charging efficiency; cost = grid energy × entered rate

Your values in the formula

40 kWh × 8 ÷ 88% = 363.64 kWh from the wall; × $0.00 = $0.00

Assumptions and rounding

Distance is used only for the cost-per-100-distance metric.
The rate must match the charging time if the tariff is time-based.

Battery conditioning, charger losses, temperature and tariffs affect real cost. Use a measured wall-energy figure when available.

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What the result means

Use it as a scenario

Battery conditioning, charger losses, temperature and tariffs affect real cost. Use a measured wall-energy figure when available.

Adding 40 kWh to the battery in eight sessions at 88% efficiency draws about 363.6 kWh from the wall before pricing.

What can change

Check before deciding

01Cold or hot conditions can add battery-conditioning energy.
02Public charging can use session, time or idle fees not represented here.

Formula and context sources

Verify this calculation

Source links establish context or measurement relationships. Your personal rate and project values remain your inputs.

USAconsumer

Save energy at home

U.S. Department of Energy

Independent home-efficiency guidance.

Open official resource

UKbills

Understand electricity and gas bills

Ofgem

Official guide to common bill components.

Open official resource

Australiabills

Find the best energy deal

Australian Government

Explains bill comparison and the role of supply and usage charges.

Open official resource

Singaporeconsumer

Electricity consumer information

Energy Market Authority

Official electricity-market and consumer guidance.

Open official resource

Plain-language guide

How to estimate home EV charging cost

Calculate EV energy drawn from the wall, charging losses and cost per 100 km or miles.

Read the guide

Continue the decision

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Written and maintained by Tilock SadhukhanReviewed 21 July 2026Version 1.0