ready reckoner
A "ready reckoner" is a tool used to simplify calculations and quick reference, commonly found in fields like commerce, finance, and engineering.
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Definition
C1Commerce
(historical)A printed book or table containing precalculated values to facilitate quick reference for common numerical tasks.
Example
- Merchants used a ready reckoner to quickly apply discounts and calculate totals.
B2Technology
(modern)A computer program or online tool that performs calculations automatically.
Example
- Many websites offer a ready reckoner to help users calculate loan interest rates.