verb (used with object), calculated, calculating.
to determine or ascertain by mathematical methods; compute: to calculate the velocity of light.
to determine by reasoning, common sense, or practical experience; estimate; evaluate; gauge.
to make suitable or fit for a purpose; adapt (usually used passively and with an infinitive): His remarks were calculated to inspire our confidence.
Chiefly Northern U.S.
to think; guess.
to intend; plan.
verb (used without object), calculated, calculating.
to make a computation or form an estimate.
to count or rely (usually followed by on or upon ): They calculated on good weather.

1560–70; < Late Latin calculātus reckoned (past participle of calculāre), equivalent to calculus pebble (see calculus) + -ātus -ate1

precalculate, verb (used with object), precalculated, precalculating.

1. count, figure, cast. 3. design, plan, intend, mean. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
calculate (ˈkælkjʊˌleɪt)
1.  to solve (one or more problems) by a mathematical procedure; compute
2.  (tr; may take a clause as object) to determine beforehand by judgment, reasoning, etc; estimate
3.  (tr; usually passive) to design specifically; aim: the car was calculated to appeal to women
4.  (intr; foll by on or upon) to depend; rely
5.  dialect (US) (tr; may take a clause as object)
 a.  to suppose; think
 b.  to intend (to do something)
[C16: from Late Latin calculāre, from calculus pebble used as a counter; see calculus]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1560s, "to compute, to estimate by mathematical means," from L. calculatus, pp. of calculare "to reckon, compute," from calculus (see calculus). Meaning "to plan, devise" is from 1650s. Replaced earlier calculen (mid-14c.), from O.Fr. calculer. Related: Calculable
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
To calculate the real exchange rate, you need a gauge of prices in each country.
When you have the perimeters of the path staked out, you can calculate its area
  and estimate the amount of material you will need.
By measuring the amount of red and green in the paintings, the scientists aimed
  to calculate the amount of dust in the atmosphere.
Researchers have found a way to mathematically calculate the rarity of a
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