ready reckoner

noun

ready reckoner

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

First recorded in 1750–60

William Sutcliffe on his return said that Sammy's three notes were pinned in a ready reckoner.

Having been pinned in the ready reckoner, it would show the marks of pin-holes.

True, all turns on your Ready-Reckoner being moderately correct,—being not insupportably incorrect!

We are to judge of every individual case as it arises, apparently without any social summary or moral ready-reckoner at all.

The French word barme or barrme, a ready-reckoner, is derived from his name.

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