About this Home vs Public EV Charging Cost Calculator
Home and public charging can have very different prices. This calculator compares the same energy need at each rate, including an optional public session fee.
Who this calculator is for
- EV shoppers comparing real-world driving costs.
- Drivers deciding whether charging, gasoline, or hybrid fuel use fits their budget.
- Households testing commute, trip, and ownership assumptions before changing vehicles.
When to use it
- Compare two or more vehicle energy-cost scenarios with the same mileage.
- Replace national averages with local utility, charger, and fuel prices.
- Run conservative and optimistic assumptions before making a car-shopping decision.
How to use this calculator
- Enter the miles, efficiency, and price assumptions that match your scenario.
- Use local electricity, public charging, and gas prices where possible.
- Review the lower-cost option, then adjust one assumption at a time to compare cases.
Key assumptions
- All prices and vehicle assumptions are user-entered.
- Charging loss is modeled as a simple percentage.
- Calculations run locally in your browser and are not stored by Calwarden.
- Results are planning estimates, not financial, tax, insurance, legal, or mechanical advice.
Dataset sources
- Effective date
- 2024
- Last reviewed
- 2026-05-05
State and national average retail rates are planning references, not a utility tariff or time-of-use schedule.
Public U.S. Energy Information Administration data.
Accuracy and testing
Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.
How this calculator works
Inputs explained
Mileage
Use the same miles for each option so the comparison stays apples-to-apples.
Vehicle efficiency
Enter EV miles per kWh and gas or hybrid MPG from EPA estimates or your own driving history.
Energy prices
Use your home utility rate, public charger price, or local fuel price.
Charging loss
EV energy from the wall is higher than battery energy because charging is not perfectly efficient.
Understanding your results
Example scenarios
Example comparison
Adding 50 kWh with 10% charging loss costs about $8.89 at $0.16/kWh home charging versus $25.00 at $0.42/kWh plus a $1.67 session fee.
Key Features
- Side-by-side cost comparison
- User-entered local rates
- Private client-side calculation
Tips & Best Practices
- Use off-peak electricity rates for home charging if that is when you charge most often.
- Use actual trip or commute efficiency when your vehicle reports it.
- Run high-price and low-price cases for gas and public charging before relying on one scenario.