EV vs Gas Cost Calculator — Compare Annual Fuel Costs
Calculate and compare the true annual fuel cost of driving an electric vehicle versus a gasoline car. Includes charging costs, miles per year and CO2 savings.
Estimate scope & data quality
This tool provides an input-driven estimate. Use the required inputs shown above and review the result limitations below.
- Data quality
- NOT_AVAILABLE
- Result limitation
- Calculator output is not a source-complete customer result.
A tariff credit is distinct from annual savings. If a result is NOT_COMPUTABLE or CONFLICT, it must not be replaced with an estimate or treated as canonical.
How to use this calculator
- Enter your annual mileage (check your odometer or estimate based on your driving habits).
- Enter the current average gas price in your area.
- Enter your current car's fuel efficiency in MPG (miles per gallon).
- Enter your home electricity rate in $/kWh (check your bill or use the state selector).
- Enter your EV's efficiency in miles per kWh (typically 3–4 for most EVs).
- Your annual fuel cost comparison, 5-year savings and CO2 reduction appear instantly.
Understanding your results
Gas cost is calculated as (annual miles ÷ MPG) × gas price per gallon.
EV charging cost is calculated as (annual miles ÷ miles per kWh) × electricity rate.
CO2 savings accounts for both tailpipe emissions from gasoline (~8.887 kg CO2/gallon) and the emissions from electricity generation (~0.386 kg CO2/kWh US average).
Note: Electricity rates vary significantly. Home charging (overnight) is typically much cheaper than public DC fast charging.
Frequently asked questions
Direct answers for US homeowners.
Related guides
In-depth articles on sizing, costs, and energy decisions.