EV Charging Cost Calculator
Estimate home EV charging cost from battery size, charging efficiency, and electric rate.
This page is an editable estimator with realistic defaults so you can model your own situation in minutes.
Charging cost = battery kWh added / charging efficiency x electric rate.
Treat the result as a planning estimate and verify important numbers with the relevant official source before acting.
| Battery energy added | 45 kWh | |
|---|---|---|
| Charging efficiency | 90% | |
| Electric rate | $0.17/kWh |
Assumptions
- Electricity rates should include supply, delivery, taxes, and riders when possible.
- Time-of-use rates, tiered pricing, fixed fees, demand charges, and seasonal changes can affect actual bills.
- Usage varies with weather, occupancy, appliance age, controls, and behavior.
How this calculator works
Formula used
Charging cost = battery kWh added / charging efficiency x electric rate.
Example calculation
Plug in your own numbers and the result updates instantly. Charging cost = battery kWh added / charging efficiency x electric rate.
EV Charging Cost Calculator FAQ
Is this ev charging cost calculator exact?
No. It is an estimate for planning only. Actual bills, savings, and sizing depend on utility tariffs, weather, usage behavior, equipment efficiency, installation quality, local code, and product specifications.
What electricity rate should I enter?
Use your all-in average rate if possible: supply, delivery, taxes, and riders divided by total kWh. Time-of-use plans, demand charges, fixed fees, and tiered rates can change the result.
Should I verify before buying equipment?
Yes. Confirm solar, battery, generator, HVAC, water heater, insulation, window, and electrical decisions with qualified installers, electricians, utility programs, and local permitting requirements.