Real World Range
Tessie analyzes your historical energy usage to determine where you can realistically drive to.
You can see this calculation under Real World range on the Battery page.
You can change the historical period that's used for real world range calculations by changing Settings > Display > Real World Range Basis. For example, you can use the All Time setting and Tessie will analyze your entire driving history to estimate your real world range.
Additionally, you can use the Range Map to visualize where you can realistically drive to.