How it works
How to calculate it
The calculator applies the values you enter to this formula:
EV cost = miles ÷ mi/kWh × electric rate; gas cost = miles ÷ MPG × gas price.
How to use this calculator
- Use the same annual mileage for both vehicles.
- Enter real-world EV and gasoline efficiency.
- Apply representative electricity and fuel prices.
Worked example
At 12,000 miles, 3.5 mi/kWh and $0.17/kWh, EV energy costs about $583 versus $1,400 for a 30 MPG car at $3.50/gal.
Important assumptions
- Compares energy only.
- Charging losses, public charging prices, maintenance, insurance, taxes, and purchase price are excluded.
- Rates and efficiency should reflect your own driving.
Common mistakes to avoid
- Treating energy savings as total ownership savings.
- Ignoring charging loss or public charging.
- Comparing vehicles under different mileage assumptions.
Method reviewed June 10, 2026. Prices and rates are user-provided defaults and should be replaced with local values.