EV charging · May 2026 electricity rates
EV Battery Charge Cost Calculator
Estimate the grid energy, charging cost, and ideal charge time for an EV battery charge session from a chosen start and end state of charge.
Charge-session model
Calculate charge energy, cost, and ideal time
Real charging can be slower because of vehicle limits, power sharing, battery temperature, and charge taper.
Model note
Use your vehicle's real numbers when possible
Charge time is an idealized energy ÷ charger-power estimate. Real charging can be slower because vehicles taper charge power and limit AC input.
U.S. DOE Alternative Fuels Data Center — Electric Vehicle Charging Stations ↗
What can change the result
Charging and driving vary
Weather, speed, cabin climate, battery conditioning, elevation, charger efficiency, and onboard-charger limits can change real energy use.
Formula used
Battery energy added = usable battery kWh × state-of-charge change. Grid energy adds charging losses. Cost = grid kWh × rate; ideal time = grid kWh ÷ charger kW.
Use the exact residential rate from your utility bill when available.