EV COST CALCULATOR
EV Home Charging Cost Calculator
Calculate one charging session, monthly home charging expense, and electricity cost per mile.
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Updates instantlyEstimate the cost of charging an electric car at home
kWh
%
%
$/kWh
sessions
miles
Formula: Session cost = (battery capacity × charge added ÷ charging efficiency) × electricity rate
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How this estimate works
Charging losses mean energy drawn from the wall is greater than energy stored in the battery.
- Use your equipment data. Check a label, specification sheet, controller, or energy meter.
- Enter your utility rate. A recent bill is more useful than a national average.
- Test different schedules. Change one input at a time to compare scenarios.
Ways to reduce or refine the cost
1
Check whether your utility offers a lower overnight EV rate.
2
Precondition the cabin while connected when supported.
3
Compare cost per mile with gasoline vehicles.
Transparent methodology
Results use the values you enter and standard energy formulas. They are planning estimates, not bills or guarantees.
Frequently asked questions
Why include charging efficiency?+
Some energy is lost as heat and through power conversion.
Is Level 2 charging more expensive?+
The utility sets price per kWh. Level 2 primarily changes charging speed.
Does this calculate public charging?+
It is designed for home rates; enter a station per-kWh price when available.
How to verify this estimate
Best input
Use energy delivered from the wall, including charging losses.
Reality check
Compare odometer miles with charger or utility kWh over several sessions.
Important limitation
Temperature, charging speed, battery conditioning, time-of-use rates, and demand charges affect real cost.
Primary reference: FuelEconomy.gov. Reviewed September 2026.