Calculating

google

ref

late Middle English: from late Latin calculat- ‘counted’, from the verb calculare, from calculus ‘a small pebble (as used on an abacus)’.

etymonline

ref

calculating (adj.)

1710, "carrying out calculations," present-participle adjective from calculate (v.). Meaning "given to forethought and shrewdly or selfishly seeking advantage, scheming," is attested from 1802.

calculating (n.)

1710, "calculation," verbal noun from calculate (v.). Calculating-machine "mechanical computer, machine which performs mathematical calculations" is from 1830 [Babbage].