Methodology

Every figure here is transparent and adjustable. Here is where the numbers come from.

Electricity prices

Average residential electricity price by state, from US Energy Information Administration, Electric Power Monthly, Table 5.6.A, data for March 2026. The US average is 18.56¢/kWh. We plan to refresh these monthly from the EIA API.

Charging cost

Annual home-charging cost = miles per year × (kWh per 100 miles ÷ 100) × electricity price. Defaults: 13,600 miles a year (about the FHWA US average) and 30 kWh per 100 miles (a typical EV; the EPA range is roughly 25 to 35). This reflects home charging; public DC fast charging costs more.

Gas comparison

Annual gasoline cost = miles ÷ MPG × price per gallon. Defaults: 30 mpg and $3.9 per gallon (US average regular gasoline, EIA/AAA). Change any of these in the calculator for your own numbers.

Estimates for typical US driving, not a guarantee of your costs. Independent project, not affiliated with the EIA or any automaker.