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Papers and calculators are common tools for calculation.


Borrowed from Latin calculātus, perfect passive participle of calculō (I reckon, originally by means of pebbles), from calculus (a pebble). Refer to calculus for origin.


  • IPA(key): /ˈkælkjʊleɪt/, /ˈkælkjəleɪt/
  • (file)
  • Hyphenation: cal‧cu‧late


calculate (third-person singular simple present calculates, present participle calculating, simple past and past participle calculated)

  1. (transitive, mathematics) To determine the value of something or the solution to something by a mathematical process.
    Calculate the square root of 3 to 10 decimal places.
  2. (intransitive, mathematics) To determine values or solutions by a mathematical process; reckon.
  3. (intransitive, US, dialect) To plan; to expect; to think.
    • 1913, Joseph C[rosby] Lincoln, chapter I, in Mr. Pratt’s Patients, New York, N.Y., London: D[aniel] Appleton and Company, →OCLC:
      I stumbled along through the young pines and huckleberry bushes. Pretty soon I struck into a sort of path that, I cal'lated, might lead to the road I was hunting for. It twisted and turned, and, the first thing I knew, made a sudden bend around a bunch of bayberry scrub and opened out into a big clear space like a lawn.
  4. To ascertain or predict by mathematical or astrological computations the time, circumstances, or other conditions of; to forecast or compute the character or consequences of.
    to calculate or cast one's nativity
  5. To adjust for purpose; to adapt by forethought or calculation; to fit or prepare by the adaptation of means to an end.
    to calculate a system of laws for the government and protection of a free people
    • 1671, John Tillotson, “Sermon IV. The Advantages of Religion to Particular Persons. Psalm XIX. 11.”, in The Works of the Most Reverend Dr. John Tillotson, Late Lord Archbishop of Canterbury: [], 8th edition, London: [] T. Goodwin, B[enjamin] Tooke, and J. Pemberton, []; J. Round [], and J[acob] Tonson] [], published 1720, →OCLC:
      [Religion] is [] calculated for our benefit.
  6. (chess) To imagine sequences of potential moves and responses without actually moving the pieces.



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  1. second-person plural present active imperative of calculō
    1. "calculate ye, compute ye"
    2. (figuratively) "consider ye as, esteem ye"



  1. vocative masculine singular of calculātus




  1. second-person singular voseo imperative of calcular combined with te