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Use the calculator for an instant estimate, or read on for a full breakdown of how this cost is calculated.
Examples and calculation text checked September 22, 2026. This is a planning guide, not an individual engineering review.
Illustrative example
$360/year
Declared inputs, not a typical-home range
12,000 miles ÷ 100 × 30 kWh/100 miles × 50% home charging = 1,800 home kWh/year. At $0.20/kWh, that is $360/year, or $30 per average month.
The vehicle label expresses electricity consumption in kWh per 100 miles. For a home electricity estimate, use a consumption figure representing electricity at the charger; battery-only readings need an explicit charging-loss assumption.
Home share matters: charging at work or on road trips does not all appear on your home meter. This calculator treats home share as the share of charging energy, uses one flat energy rate, and excludes public charging costs. It adds no second charging-loss multiplier.
The calculator starts with the same example. Its $30 average-month cost is annual cost divided by 12; seasonal bills can look very different. The $0.20/kWh rate is illustrative, not a national average. Use your energy rate; fixed fees and taxes are separate.
The starting values are an example. Replace them with your equipment and usage.
Use electricity measured at the charger or an equivalent wall-energy estimate. If your consumption figure already includes charging losses, do not add them again. Public charging is excluded by the home share.
1,800 kWh per year
$360.00 per year
$30.00 per average month (annual cost ÷ 12)
Energy charges only. Fixed fees, taxes, tiered and time-of-use billing are excluded. The average month is not a seasonal forecast.
Total annual driving
Wall-energy consumption and whether charging losses are already included
The share of charging done at home
Your home energy rate, which may vary by charging time
Before making a change
Check the large loads and uncertain assumptions first. Compare a specific change against your existing equipment before deciding whether an upgrade is worth investigating.
These sources explain units and equipment labels. The worked household values are illustrative inputs, not measured customer data or published typical-use ranges.
Follow the free walkthrough to build a household electricity estimate, review its assumptions and compare changes. The optional $19 purchase unlocks both dated PDF report formats for your household profile.
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