300 wh/mile seems to be about what most electric cars achieve. 10 miles/day * 300 wh/mile * 30 days = 90 kWh.

The average monthly energy consumption per capita in the U.S. is about 1000 kWh[1], so in order to double that with electric cars every individual would need to drive an average of 110 miles per day.

[1] https://www.worlddata.info/america/usa/energy-consumption.ph...