EV vs Gas — What Does Each Mile Actually Cost?

Cost per mile at your rates, worked out

The EV vs gas calculator compares what a mile costs in each kind of car by dividing your fuel price by your car's efficiency — at its default settings, gas works out to 11.5¢ per mile and home-charged electricity to about 4.3¢. Here's the walk-through: $3.45 a gallon ÷ 30 MPG = 11.5¢ a mile. $0.15 per kWh ÷ 3.5 miles per kWh = 4.3¢. Over a 12,000-mile year that's $1,380 in gas versus about $514 in electricity — roughly $866 staying in your pocket. Per 1,000 miles, it's $115 versus $43. Those four inputs are all the tool needs; change any one and every number updates.

Fast charging is where the gap closes, so be honest about your road trips. DC fast chargers commonly run 30–50¢ per kWh; at 40¢ with the same 3.5 mi/kWh, a mile costs 40 ÷ 3.5 ≈ 11.4¢ — the gas car's number, on the road. The realistic picture is blended: cheap overnight home charging for daily miles, premium rates a few weekends a year. Also check whether your utility offers time-of-use pricing; dropping home rates from 15¢ to 10¢ takes the EV down to 10 ÷ 3.5 ≈ 2.9¢ a mile, and suddenly even the annual total looks like a typo.