EV Charging Cost Calculator: Home, Public, and DC Fast

What does it really cost to charge an EV?

The advertised number is usually around 3–5 cents per milefor home charging, and that's roughly right for a typical EV at the US average residential rate (about $0.16 per kWh as of 2024 EIA data). But headline numbers ignore where you actually plug in. The same car costs two to three times more per mile if you live on DC fast chargers. This calculator lets you split the math by charger type so the answer reflects how you'll really charge.

Why DC fast is 2–3× more expensive than home

Home Level 2 charging draws from your residential meter at whatever rate your utility charges — typically $0.10–0.30/kWh depending on state. DC fast charging on a public network is a different product: you're paying for 150–350 kW of dedicated hardware, the utility's commercial demand charges for that peak draw, real-estate at a highway-adjacent location, and the network operator's overhead. End result: Electrify America runs about $0.48/kWh on its standard plan, EVgo is around $0.36/kWh on a membership plan and higher off-plan, and ChargePoint pricing depends on the site host. Tesla Supercharger is usually cheaper than third-party fast charging — often $0.30–0.40/kWh — but still well above home rates.

The practical implication: a road trip that's 100% DC fast charged on Electrify America at $0.48/kWh and 30 kWh/100mi works out to about 14 cents per mile— more than gas at most pump prices for a 30 mpg car. DC fast is for travel, not for daily driving. If you can't home-charge, the calculator's per-mile output is the most honest signal of whether an EV is actually cheaper to fuel than a gas car for you.

Tiered and TOU rates: when overnight charging really pays

Many utilities offer time-of-use (TOU) plans designed around EVs. A typical structure has a low overnight super-off-peak window (often 11 PM to 6 AM, sometimes longer on weekends) at $0.08–0.12/kWh, mid-peak rates during the day, and a high on-peak window in the late afternoon and evening. Charging a 75 kWh battery from 20% to 80% — about 45 kWh — costs $4–5 at super-off-peak vs $9–10 on a flat plan, or $15+ if you charge during peak.

The catch: TOU plans usually apply to your whole house, so dishwashers and AC runtime during peak hours get expensive too. Most EV-friendly utilities now offer separately metered EV-only TOU rates that isolate the vehicle from the rest of your usage. Worth a 10-minute phone call to your utility — savings of $300–600 a year are common.

What Level 2 actually delivers vs Level 1

The per-kWh cost is identical between Level 1 (a regular 120-volt outlet) and Level 2 (240-volt, 30–50 amps) at home — they pull from the same meter. The difference is rate of charge. L1 adds about 3–5 miles of range per hour. Over a 12-hour overnight window that's 40–60 miles — enough for the median commute, not enough for back-to-back high-mileage days. L2 at 7–11 kW adds 20–40 miles per hour, so a full battery overnight is easy and you can recover from a long day in a couple of hours.

The install cost for L2 is the real question, and it varies enormously: a straightforward dedicated 240V circuit close to the panel might be $400–800 in parts and a few hours of an electrician's time. A long conduit run, a panel upgrade, or permit-heavy jurisdictions can push it past $2,000. See the home charger ROI calculator for whether your situation pencils out.

Public charging network reality: ChargePoint, EVgo, Electrify America

Public charging pricing is inconsistent across networks, plans, and sites. As of early 2026 the rough picture:

• Electrify America — Standard pay-as-you-go is about $0.48/kWh on DC fast in most states; the Pass+ membership ($7/mo) drops it to roughly $0.36/kWh. Idle fees apply after charging completes.
• EVgo— Around $0.36/kWh on the membership plan, higher off-plan. Per-minute pricing in some states where per-kWh billing isn't allowed makes the effective rate depend on your car's peak charging speed.
• ChargePoint — A roaming network; the site host sets the price. Workplaces often offer L2 free or at a low flat session fee; commercial DC fast sites are typically $0.35–0.55/kWh.
• Tesla Supercharger — Open to non-Tesla EVs at many V3 and V4 sites with the right adapter and the Tesla app. Pricing is usually $0.30–0.45/kWh and varies by time of day at congested sites.

If you plan to use public charging more than occasionally, membership plans almost always pay back within a couple of months. And don't ignore the network "hidden" costs: idle fees, session fees, and minimum charges at low-energy stops can push the effective per-kWh rate higher than the headline.

What to do with this number

The cost per mile this calculator shows is the most useful single figure for comparing fuel cost to a gas car or a different EV. Try the EV vs gas TCO calculator to see the full ownership picture including depreciation, maintenance, insurance, and tax credits — because charging cost is usually only 20–30% of total operating cost.