I bought the truck with the odometer at 59,322. I'm sure it rolled over a time or two. Here is a photo of the final odometer reading: 69,089. This is a total of 9,767 electric miles.
The new odometer had 26 miles when I installed it. So, to calculate my current total of electric miles is CURRENT_VALUE + 9,741. So, I will hit 10,000 electric miles when my new odometer reads 259.