Source : Webster's Revised Unabridged Dictionary (1913)

Calculative \Cal"cu*la*tive\, a.
   Of or pertaining to calculation; involving calculation.

         Long habits of calculative dealings.     --Burke.

Source : WordNet®

calculative
     adj : used of persons; "the most calculating and selfish men in
           the community" [syn: {calculating}, {conniving}, {scheming},
            {shrewd}]