cal·cu·late / ˈkalkyəˌlāt/ • v. [tr.] 1. determine (the amount or number of something) mathematically: Japanese land value was calculated at 2.5 times that of the U.S. ∎  determine by reasoning, experience, or common sense; reckon or judge: I was bright enough to calculate that she had been on vacation. ∎  [intr.] (calculate on) include as an essential element in one's plans: he may have calculated on maximizing pressure for policy revision.2. ∎  (usu. be calculated to do something) intend (an action) to have a particular effect: his last words were calculated to wound her. ∎  suppose; believe.DERIVATIVES: cal·cu·la·tive / -ˌlātiv/ adj.

cal·cu·lat·ed / ˈkalkyəˌlātid/ • adj. (of an action) done with full awareness of the likely consequences: a calculated decision. ∎  carefully planned or intended: vicious and calculated assaults. ∎  (of an amount or number) mathematically worked out or measured.DERIVATIVES: cal·cu·lat·ed·ly adv.

calculate XVI. f. pp. stem of late L. calculāre, f. calculus stone (see next); superseded †calcule (XVI–XVI) — (O)F. calculer; see -ATE 3.
So calculation XIV. — (O)F. — late L.