An exalted planet gets 100% strength. In Vedic Astrology 100% strength is 60 Shashtiamsas or Virupas or 1 Rupa.
When a planet occupies its deep exaltation point or Uchabhaaga, it gets a strength of 1 Rupa. Similarly, when it occupies its deep debilitation point, it gets zero strength.
Exaltation strength is given by the formula
Exaltation Strength = Planet’s longitude – Its debilitation Point/180 * 60 ( in Virupas or Shastiamsas )
where the difference is more than 180, it is to be subtracted from 360