**Method:**the general idea is to take a drive and divide kWh consumed by distance as displayed by the range meter. In order to reduce rounding errors I started and ended the test just as the range meter dropped a digit, and for kWh I reset a trip meter at the start of the test and then calculated the kWh as measured distance traveled * the Wh/mile displayed. Since the trip meter has one sig digit and my test was measured at 15.5 miles, the inaccuracy is ~ +/- 1/300 in both the distance and Wh/mile numbers. All told, ~ 1%

**Results:**

- Range dropped 22 miles
- 15.5 miles and 316 Wh/mile per the trip meter

**The calculated constant**is (15.5*316)/22 =

**222.6 Wh/mile**

If I recall correctly EPA is 227 Wh/mile for my Model 3 LR. Presuming my memory is correct, this is good evidence that the constant is unchanged.