ready reckoner

American  

noun

1. reckoner.

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ready reckoner British  

noun

1. a table of numbers used to facilitate simple calculations, esp one for applying rates of discount, interest, charging, etc, to different sums

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Etymology

Origin of ready reckoner

First recorded in 1750–60

Example Sentences

Alongside a new "ready reckoner" tool, allowing farms to calculate how much they might be offered, Irranca-Davies announced £33m for nine preparatory schemes to " back farm businesses during the transition to the new SFS".

From BBC • Jul. 20, 2025

He never opened a book, save a manual of husbandry or a ready reckoner; he could conceive of no reason for walking, unless it were the business of the farm.

From In Clive's Command A Story of the Fight for India by Strang, Herbert

You’ve a good business, Mr. Macartney, so I dare say you’re a ready reckoner.

From We and the World, Part II A Book for Boys by Ewing, Juliana Horatia Gatty

He consulted a ready reckoner that was on the desk.

From The Ragged Trousered Philanthropists by Tressell, Robert

He can do sums in his head, is a ready reckoner.

From The Forest Lovers by Hewlett, Maurice Henry