reckon

/ˈre-kən/

Middle English rekenen, from Old English -recenian (as in gerecenian to narrate); akin to Old English reccan

verb

  1. count

  2. estimate, compute

  3. to determine by reference to a fixed basis

reckon the days till Christmas

reckon the height of a building

phrasal verb

  1. to expect (something) to happen : to plan on (something)

The train was an hour late, which was something we hadn't reckoned on.

phrasal verb

  1. to calculate the total number or amount of (something)

He reckoned up the bill.