Real-World Range
Tessie analyzes your historical energy usage to determine your realistic range.
You can see this calculation under Battery > Real-World.
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, which is particularly useful if you're near an area with significant elevation changes.