EV Charging Cost Calculator
Calculate the cost to charge an electric vehicle at home or public charging stations. Enter values for instant results with step-by-step formulas.
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer
EV Charging Cost Calculator
Calculator
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Formula: Energy Needed = Battery × (Target% - Current%) / 100 | Cost = Energy × Rate
Worked example — $4.32 (Level 2: 5 hrs)
Formula
Energy Needed = Battery × (Target% - Current%) / 100 | Cost = Energy × Rate
Home charging (Level 2) is cheapest at ~$0.12/kWh. Public fast chargers: $0.30-0.60/kWh. Charging to 80% is most efficient.
Worked Examples
Example 1: 60kWh battery 20→80%
Problem:60kWh battery, 20% to 80%, $0.12/kWh
Solution:36kWh × $0.12 = $4.32
Result:$4.32 (Level 2: 5 hrs)
Example 2: Public DC fast charging top-up
Problem:A 75 kWh battery is charged from 15% to 80% at a public DC fast charger billing $0.35/kWh.
Solution:Energy needed = 75 × (80 - 15) / 100 = 48.75 kWh Cost = 48.75 × $0.35 = $17.06 DC fast time ≈ 48.75 / 50 = 0.98 hrs (≈59 min, before tapering above 80%)
Result:$17.06 for the session (≈59 minutes at 50kW)
Frequently Asked Questions
Is it cheaper to charge at home?
Yes — home electricity averages $0.12/kWh vs $0.30-0.60/kWh at public fast chargers. Charging at home overnight costs about $4-8 for a full charge.
What is the difference between Level 1, Level 2, and DC fast charging?
Level 1 uses a standard 120V outlet and adds only 3–5 miles of range per hour. Level 2 uses a 240V charger (7–11 kW) and adds 20–30 miles per hour. DC fast charging (50–350 kW) can add 100–200 miles in under 30 minutes but is more expensive per kWh.
How much does it cost to drive an EV per mile compared to a gas car?
At $0.12/kWh and 3.5 miles per kWh efficiency, EV fuel cost is about $0.034 per mile. A gas car at 30 mpg and $3.50/gallon costs $0.117 per mile. EVs are typically 3–4 times cheaper to fuel than equivalent gasoline vehicles.
How much can I save per month by charging at home instead of at public stations?
For a typical driver adding 30 kWh per charge session several times a week, switching from a $0.35/kWh DC fast charger to $0.12/kWh home charging saves about $0.23 per kWh. At 900 kWh of monthly charging (roughly 3,000 miles at 3.3 mi/kWh), that's a difference of about $207 per month, or close to $2,500 per year. Even switching from a $0.25/kWh public Level 2 charger to home charging saves roughly $117/month at the same usage. This is the single biggest lever EV owners have over their fuel costs, which is why installing a home Level 2 charger typically pays for itself within 1-2 years for daily commuters.
Does charging speed (Level 2 vs DC fast) affect the total cost, or just the time?
The energy cost formula (kWh × price per kWh) is the same regardless of charging speed, but the price per kWh usually differs by charger type — DC fast chargers charge a premium price precisely because they deliver energy faster and tie up expensive high-power hardware. So charging speed doesn't change the physics of the calculation, but it strongly correlates with which price tier you'll pay. Planning routine charging at home or work overnight and reserving DC fast charging for road trips is the standard way EV owners minimize the price-per-kWh premium while still getting fast charging when time actually matters.
How do I estimate EV range and charging costs?
EV range depends on battery size (kWh), efficiency (miles per kWh, typically 3-4), temperature, speed, and terrain. Charging cost = battery size x electricity rate / charger efficiency (about 90%). At $0.15/kWh, fully charging a 75 kWh battery costs about $12.50.
How do I calculate fuel cost per mile?
Divide the price per gallon by your vehicle's MPG. At $3.50/gallon with 28 MPG, your fuel cost is $0.125 per mile. For total driving costs including maintenance, insurance, and depreciation, the IRS standard mileage rate (67 cents/mile in 2024) provides a rough benchmark.
References
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer · Editorial policy
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