ready reckoner

• Livro ou tabela com valores pré-calculados, como taxas de juros, impostos ou outros dados numéricos, usada para consulta rápida sem a necessidade de fazer cálculos.

A book or table of pre-calculated values, such as interest rates, taxes, or other numerical data, used for quick reference without needing to perform calculations.

1. Calculation aidC1formalbritish

   A book or table of pre-calculated values used for quick reference, especially in finance or mathematics.

   Tabela de cálculo rápido

   • The accountant used a ready reckoner to calculate the interest quickly.
   • Before computers, builders relied on a ready reckoner for material estimates.
   • The tax ready reckoner helped him determine his annual liability.