[Sodman]

The issue is that the number displayed on the dash can be toggled between "% battery remaining" or "miles remaining". The "Miles remaining" is actually "EPA rated miles x % battery remaining", and NOT "miles remaining based on last 10 miles driven, or current navigation destination".

If they removed the 'Miles remaining' number and only showed a percentage, you would end up having to do the exact same conversion in your head anyways. "Oh I have 43% remaining of my 330 mile battery, how much is that?" so this is really just a quick shortcut.

Tesla has a separate screen with very clear range estimates that the user can toggle (based on last n miles or based on current exact 'instant' reading). In addition, when navigating to a destination, the nav tells you the estimated battery % on arrival, which is also based on current driving and is generally quite accurate. In addition, it will tell you during & after the trip exactly why the estimated and actual range differed. Eg "0.5% extra battery used due to a 5.6mph headwind, 2% extra battery used by driving over 70mph", etc.

Having a count-down 'Miles remaining' on the dashboard doesn't always make sense, particularly when you haven't entered a destination, or if you're switching between highways and back rounds a bunch. Either way, it's never going to actually be accurate down to the last mile. In reality, you just have to know that the miles on the dashboard are "EPA miles", meaning if you're driving on a flat surface in good conditions at ~55mph, that's what you'll get. If you change your speed, or conditions get worse, you know you'll need to adjust it in your head (or use the dedicated in-car screen to automatically figure it out for you!).

[GuB-42]

I don't know how it is done with EVs but my gas car usually underestimates my range despite me burning more fuel than what's written on the brochure.

It is common sense to take conservative estimates when you are missing data. The range indicator on the dashboard is a "will I make it" indicator. To help me decide if I need to plan a refuel/recharge. I don't want a best case scenario, not even an average, I want something like a 90 percentile.

In good conditions, the "enhanced" estimate (with nav) should be more than the baseline, as some of conservative estimates can now be replaced with more accurate data.

Good thing Tesla is not doing airplanes.