There are several measures of range for Model S, the three most common being Rated Range, Ideal Range and Typical Range. The latter two are the names used in North America and Europe, respectively, for the same thing.

Rated Range is the distance that Model S can travel on a full charge using the EPA 5 test. For the 85 kWh cars it is 265 miles, and for 60 kWh cars it is 208 miles.

It has been suggested that the calculation of rated range displayed in Model S is dependent on driving syle - i.e., more aggressive vs more gentle driving will yield different rated range values for the same battery State of Charge, but so far there is no empirical evidence to support this assertion.