Calculator
EV Charging Cost Calculator
How much does it cost to charge your EV? Enter your battery size, charge target, and electricity rate to get an instant estimate — per session, per mile, and per full charge.
Cost to charge
$0.00
How charging cost is calculated
The cost to charge an EV is the amount of energy you put into the battery times the price you pay per kilowatt-hour, with a small adjustment for the energy lost as heat during charging.
The formula is:
cost = ((target % − current %) / 100) × battery kWh × rate / efficiency
For a 75 kWh battery charged from 20% to 80% at $0.16/kWh and 90% efficiency, that’s 0.6 × 75 × 0.16 / 0.9 = $8.00.
Frequently asked questions
How much does it cost to fully charge an EV?
For a typical EV with a 75 kWh battery and US average residential electricity at $0.16/kWh, a full 0 to 100% home charge costs about $13.30 (accounting for ~10% charging losses). Public DC fast charging at $0.43/kWh would cost roughly $35.80.
What is charging efficiency and why does it matter?
Some energy is lost as heat during charging. Home Level 2 chargers are about 88–92% efficient. DC fast chargers run 90–94%. The calculator uses 90% by default — set it to 95% if you have a high-end home charger or 85% for older Level 1 setups.
Are electricity rates really that different by state?
Yes. As of 2026, US residential rates range from about $0.10/kWh (Washington, Louisiana) to $0.40+/kWh (Hawaii, California). For accurate cost in your state, check the per-city pages or look up your utility bill’s "delivery rate."
Does the calculator account for time-of-use rates?
This calculator uses a flat rate. If your utility offers time-of-use (TOU) pricing with cheaper overnight rates, use the Home Charging Cost Calculator instead — it has dedicated peak/off-peak inputs.