EV Charging Cost Calculator
Estimate electric car charging cost, range added, and charging time
Calculation Steps
How EV Charging Cost Is Estimated
Charging cost depends on battery energy, charger losses, and price per kWh.
Battery energy
Charge session mode uses battery size and the percentage added. Trip mode uses distance and kWh per 100 miles or kilometers.
Charging loss
Not every kWh from the outlet reaches the battery. Losses account for conversion overhead, heat, and charging electronics.
Charging time
Time is grid energy divided by charger power. Real sessions can be slower when the car tapers power near a high state of charge.
EV Charging Examples
Quick estimates for home charging, public charging, and trip planning.
Home charge session
A 75 kWh battery charged from 20% to 80% adds 45 kWh before losses.
Road trip energy
A 250-mile trip at 32 kWh/100 mi uses about 80 kWh at the battery.
Charging loss impact
With 10% charging loss, adding 45 kWh to the battery requires about 50 kWh from the grid.
EV Charging Cost Calculator FAQ
Common questions about EV charging cost, kWh, losses, and charging time.
How do I estimate EV charging cost?
Multiply the grid energy used by your electricity price per kWh. The calculator adds charging losses so grid energy is higher than energy stored in the battery.
What is charging loss?
Charging loss is energy lost as heat or conversion overhead while charging. Home AC charging often lands around 8% to 15%, but the real value depends on the car, charger, temperature, and charge level.
Should I use kWh/100 miles or miles per kWh?
This calculator uses kWh per 100 miles or kWh per 100 km because it works directly with energy cost. If your car shows miles per kWh, divide 100 by that value.
Why does fast charging cost more?
Public DC fast chargers often price electricity higher than home rates and may add session, idle, or time-based fees. Enter the effective price per kWh for the charger you plan to use.
Is charging time exact?
No. Charging time is a planning estimate from grid kWh divided by charger kW. Real charging can taper at higher battery percentages and vary with temperature.