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

On large matters he went right by the very largeness of his mind; but in small matters he suffered from the lack of any logical test and ready reckoner.

From Appreciations and Criticisms of the Works of Charles Dickens by Chesterton, G. K. (Gilbert Keith)

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

Fritz was the ready reckoner of the three, and quickly answered, "Twelve hundred horses, six hundred wagons, and six hundred drivers."

From Pixy's Holiday Journey by Lang, George

This story may serve to show how nature supplies man with a ready reckoner in his faculty of perception, which suffices well enough for the affairs of the simpler sort of life.

From Anthropology by Marett, R. R. (Robert Ranulph)