Pick a car, your state and how far you drive. See the monthly electric bill next to gas. Rates are state averages; change them to match your bill.
mi/mo
kWh/100 mi
EPA figure, charging losses included.
%
¢/kWh
$/kWh
$/gal
mpg
Electric, per month
–
– per 100 miles
Gas, per month
–
– per 100 miles
Where these numbers come from
Home rates: EIA residential averages, August 2026 (preliminary). Gas: AAA regular, October 30, 2026. Public charging: Paren, Q3 2026 US average. The 18¢ default is AAA's home-rate assumption.