EV Charging Cost Calculator
Enter how far you drive, your car's efficiency and your electricity price to estimate the energy used and the cost of charging.
How it works
Energy used = distance × (kWh per 100 miles ÷ 100) × (1 + extra loss ÷ 100). Cost = energy × electricity price. Efficiency entered as miles per kWh or MPGe is first converted to kWh per 100 miles (kWh/100 mi = 100 ÷ miles per kWh = 33.705 × 100 ÷ MPGe).
Worked example: 1,000 miles at 30 kWh/100 mi uses 300 kWh. At $0.16 per kWh that is $48.00, or $0.048 per mile.
Assumptions
- EPA label kWh/100 mi and MPGe values already include Level 2 AC charging losses, so the extra-loss box defaults to 0. If you use a figure from your car's dashboard (battery side), enter your own estimate of charging loss.
- A single flat electricity price. Time-of-use rates, demand charges, public-charger fees and idle fees are not modeled.
- Efficiency stays constant. Real consumption changes with speed, temperature, HVAC use and terrain.
- The $0.16 default price is only a placeholder. Use the rate on your own utility bill.
Frequently asked questions
Does the EPA kWh/100 miles number include charging losses?
EPA states that MPGe values include charging losses and assume Level 2 AC charging, measuring energy from the wall outlet. The label's kWh/100 miles is derived from the same recharge energy.
How is MPGe calculated?
EPA uses 33.705 kWh of electricity as the energy equivalent of one gallon of gasoline. A car using 33.7 kWh per 100 miles rates about 100 MPGe.
Related calculators
- EV charging time calculator
- Gas vs electric cost per mile
- MPGe, kWh/100 mi and miles/kWh converter
- EV charger power and miles-per-hour calculator
- Cost to charge an EV battery from X% to Y%
- EV home charging cost per month
- EV road trip charging cost calculator
- kW to kWh calculator
Sources
Formulas and reference values are from these sources. Page last reviewed 2026-10-19.