$15.30full charge
The i4 eDrive40 (81 kWh) costs about $15.30 to charge fully at Colorado's average home rate of 17.17¢/kWh, including about 10% charging loss (89.1 kWh from the wall). That is $4.59 per 100 miles.
EIA residential average, Colorado, 2026-08 (latest in this book). EIA weekly retail regular, Colorado, week of Oct 19, 2026.
At 1,000 miles a month and 30 mpg, home charging costs $45.94 and the gas car costs $142.47. The EV saves $96.53 a month at $4.274/gal. Both miles and mpg are editable on the calculator.
The listed DC fast-charge time is 10–80% in 31 min (estimate) at up to 205 kW. A full home charge is a different session. This page prices the energy from the wall, not how long a Level 2 charger takes.
This page uses the residential rate. Public fast-charging prices are a separate scenario and are not included.