See your monthly home-charging cost, cost per mile & savings vs gas.
All-in delivered rate: total bill ÷ total kWh.
From the trip computer. Most EVs are 2.5–4.5.
~1,125/mo ≈ 13,500 mi/yr (US average).
Wall-to-battery. ~85–90% for Level 2 home charging.
"Usable" (not gross) from the spec sheet.
A real top-up, e.g. 80%, not always 0→100%.
US regular average ~ $4.27 (AAA).
The car you're comparing. Leave 0 to skip.
Budgeting estimate only — not a guaranteed bill. Real costs vary with cold weather (which can cut efficiency 20–40%), driving style, HVAC use, terrain, and highway vs city mix. This tool models home (Level 2) AC charging at a single blended rate — it doesn't cover DC fast or public charging, time-of-use spikes, solar self-generation, or net-metering credits. The gas comparison is fuel/energy only and excludes maintenance, insurance, depreciation, and charger install. All math runs in your browser — nothing is sent anywhere.
This calculator turns your electricity rate, EV efficiency, and miles driven into a real dollar figure: your monthly home-charging cost (with annual in the subtext), your cost per mile, your cost per charge, and — if you fill in the gas fields — your savings vs gasoline. It corrects for charging losses so you're billed for the energy you actually pull from the wall, not just what reaches the battery.
A driver pays $0.18/kWh, gets 3.5 mi/kWh, charges at 88% efficiency, drives 1,125 mi/month, has a 60 kWh usable battery topped up 80%, and compares to a 26 MPG car at $4.27/gal:
Your numbers will differ — this is the exact math the tool runs, shown step by step.
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<p>Free <a href="https://snaptoolsuite.com/ev-charging-cost-calculator/">EV Charging Cost Calculator</a> by Snap Tool Suite</p>See it live: view a real embed example →
For a typical setup ($0.18/kWh, 3.5 mi/kWh, ~88% efficiency, ~1,125 mi/month) home charging runs roughly $65/month, or about $789/year. Your rate matters most — $0.30/kWh nearly doubles it, while off-peak EV rates near $0.10/kWh cut it sharply. Enter your own numbers for a personal figure.
It's the share of wall energy that reaches the battery. Level 2 home charging loses ~6–15% (so ~85–94% efficient). Because mi/kWh is measured at the battery but you pay at the wall, leaving it out under-estimates cost by ~10–15%. Default here is 88%.
They're inverses. mi/kWh = 100 ÷ (kWh per 100 mi), so 28 kWh/100mi = 3.6 mi/kWh. For Wh/mi: mi/kWh = 1000 ÷ (Wh per mi), so 250 Wh/mi = 4.0 mi/kWh. Most mainstream EVs are 2.5–4.5 mi/kWh.
Your all-in delivered rate: total bill ÷ total kWh (supply + delivery + taxes). The advertised supply rate alone is often half the real number. Charge overnight on a TOU/EV plan? Enter that lower rate instead.
No. It models home (Level 2 / Level 1) AC charging at your entered rate. DC fast and public stations are priced much higher per kWh or per minute and are out of scope. It assumes 100% home charging.
It compares fuel/energy cost only — your electricity vs the same miles in a gas car. It excludes maintenance, insurance, depreciation, and charger install, so it isn't full cost of ownership. It's an estimate for budgeting.
Yes. 100% free, everything runs in your browser — none of your inputs leave your device.
Everything is calculated in your browser. We don't store or sell your data. Estimate only.