Meaning ofready reckonerin English

Noun

1. a book with precalculated values (multiples, etc.); tables
   The accountant used a ready reckoner to calculate tax deductions.
   Synonyms:

   tablechartcalculatorreference booklookup table
   Antonyms:

   calculator without precalculated valuesblank sheetempty tableunprepared resourcemanual calculation tool
2. a computer program for calculating values; online calculator
   The company developed a ready reckoner on their website to help customers estimate costs.
   Synonyms:

   calculatorcomputer programonline calculatorcalculation toolmathematical model
   Antonyms:

   manual calculatorabacusnon-computational toolestimatorguessing method