EV Charging Cost Calculator
Calculate your EV's charging cost per session, per mile, and per month from battery size, efficiency, and electricity rate.
Common conversions
| Input | Result |
|---|---|
| Level 1 (120 V, 1.4 kW) | 3-5 mi range/hour |
| Level 2 (240 V, 7.7 kW) | 20-30 mi range/hour |
| Level 2 (240 V, 11.5 kW) | 30-45 mi range/hour |
| DC fast charger (50-150 kW) | 10-20 min to 80% |
| 60 kWh battery, full charge @ Level 1 | ≈ 40+ hours |
| 60 kWh battery, full charge @ 7.7 kW L2 | ≈ 8 hours |
| Home rate $0.14/kWh, cost/mile @ 3.8 mi/kWh | ≈ 3.7¢/mi |
| Public DCFC $0.42/kWh, cost/mile @ 3.8 mi/kWh | ≈ 11.0¢/mi |
| Gasoline equivalent, $3.50/gal @ 30 mpg | ≈ 11.7¢/mi |
The math behind it
- Home full charge = 62 × 0.14 / 0.9 ≈ $9.64
- Public full charge = 62 × 0.42 / 0.9 ≈ $28.93
- Home cost per mile = 0.14 / 3.8 ≈ $0.037/mi
- Public cost per mile = 0.42 / 3.8 ≈ $0.110/mi
Everything you need to know
Charging cost swings enormously depending on where and how fast you charge. Comparing a home Level 2 session against a public DC fast-charge stop side by side shows why most EV owners try to do 80-90% of their charging at home.
Level 1 vs. Level 2 charging speed and cost
Level 1 charging uses a standard 120 V household outlet and delivers about 1.2-1.8 kW, adding roughly 3-5 miles of range per hour. That is enough for a driver with a short commute who plugs in every night, but it takes 40 hours or more to fully charge a large battery from empty. Level 2 charging uses a 240 V circuit, typically 32-48 A (7.7-11.5 kW), and adds 20-45 miles of range per hour, enough to fully charge most EVs overnight. The electricity itself costs the same per kWh whether it flows through a Level 1 cord or a Level 2 charger; the difference is entirely about speed and convenience, not efficiency, so choosing Level 2 is about time saved rather than money saved.
Charging at home vs. public rates
Home electricity commonly runs $0.12-$0.20 per kWh depending on region and time-of-use plan. Public Level 2 stations often charge $0.25-$0.35 per kWh or a flat per-hour fee, while DC fast chargers frequently charge $0.35-$0.55 per kWh, sometimes more at premium networks. That gap means a full charge that costs under $10 at home can cost $25-$35 at a public fast charger. Fast charging still makes sense for road trips where time matters more than cost, but relying on it for daily driving can roughly triple your annual fuel-equivalent spending compared to charging at home overnight.
Cost per mile and per kilometer math
Cost per mile is simply your electricity rate divided by your vehicle's efficiency in miles per kWh: at $0.14/kWh and 3.8 mi/kWh, that is $0.037 per mile, or about $3.70 for 100 miles driven. For metric efficiency figures, the same math works with rate divided by km/kWh, or you can convert using 1 mile = 1.609 km. Compared with a gasoline car averaging 30 mpg at $3.50/gallon (about 11.7¢ per mile), home EV charging is typically 60-70% cheaper per mile, while relying only on public DC fast charging can erase most or all of that savings.
Common applications
Compare home Level 2 charging at $0.14/kWh against public DC fast charging at $0.42/kWh to decide when paying extra for speed on a road trip is worth it.
Match the EV's daily kWh need against a home PV array's daytime production to estimate how much charging can be effectively free from rooftop solar.
Multiply cost per mile by annual mileage for each vehicle to project the energy line item of a fleet budget and compare it against gasoline or diesel costs.
A 48 A Level 2 charger at 240 V draws 11.5 kW continuous, which needs a 60 A breaker and properly sized conductors under the 125% continuous-load rule.
Common mistakes
AC-to-DC conversion and battery thermal losses add roughly 10% to grid kWh compared with battery kWh. Sizing solar or budgeting cost against pack capacity alone underestimates real electricity draw.
EV maintenance costs are typically lower than gasoline vehicles due to fewer moving parts and no oil changes. Compare full cost of ownership, not just energy cost per mile.
For drivers under 30-40 miles a day, overnight Level 1 charging (3-5 mi/hour over 8-10 hours) fully replaces the day's driving without the cost of installing a 240 V circuit.
Using DC fast chargers as a primary charging method instead of overnight home charging can roughly triple monthly charging costs due to the higher per-kWh public rate.
Frequently asked questions
How much does it cost to fully charge an EV at home?+
A 62 kWh battery at a typical home rate of $0.14/kWh costs about $9.64 to fully charge, accounting for a 10% charging efficiency loss.
Is public DC fast charging more expensive than home charging?+
Yes. Public DC fast charging commonly runs $0.35-$0.55/kWh versus $0.12-$0.20/kWh at home, making a full charge 2-4 times more expensive at a fast-charging station.
What is the cost per mile for an EV?+
At $0.14/kWh and 3.8 miles per kWh, EV cost per mile is about 3.7 cents, compared with roughly 11.7 cents per mile for a 30 mpg gasoline car at $3.50/gallon.
Does Level 1 charging cost less than Level 2?+
No. The per-kWh electricity rate is the same regardless of charging level; Level 1 just delivers power more slowly, adding 3-5 miles of range per hour versus 20-45 for Level 2.
How long does it take to charge an EV at home?+
A 60 kWh battery takes over 40 hours on a Level 1 120 V outlet but only about 8 hours on a 7.7 kW Level 2 charger, which is why most home installs use Level 2.
Do charging losses matter for cost calculations?+
Yes. AC-to-DC conversion and battery thermal losses typically add about 10% to the electricity drawn from the wall compared to the kWh that actually reach the battery, so budget for charger efficiency around 0.90.
How much does charging an EV add to a monthly electric bill?+
Driving 1,000 miles a month at 3.8 mi/kWh and $0.14/kWh adds about $37 to a home electric bill, versus roughly $117 in gasoline for a comparable 30 mpg car.
Can solar power reduce EV charging cost to near zero?+
Yes, for the portion of charging that overlaps with solar production. Scheduling home charging during midday sun hours lets many solar owners cover a significant share of their EV's energy needs directly from the panels.
Why do EV charging costs vary so much by network?+
Public charging networks set their own per-kWh or per-minute pricing, and some add idle fees or membership discounts. Rates for the same charger can differ by 30% or more between networks in the same city.