MPGe

The EPA anchors the unit at 33.7 kWh per gallon, so a 100 MPGe rating means the EV covers 100 miles on that much electricity, roughly 3 miles per kWh. The number is honest about energy and misleading about money if read like MPG: a 100 MPGe EV is not “three times cheaper” than a 33 MPG car unless a kWh costs a thirty-fourth of a gallon, which depends entirely on your utility rate and pump price.

For cost math, convert the sticker to miles per kWh (MPGe divided by 33.7) and price it directly: that, not MPGe, is the input the EV vs gas savings calculator uses. Window stickers list both figures, and real-world efficiency runs below the rating in cold weather and at highway speed.