The various embodiments of the present invention provide a computer readable method of text to speech conversion. The computer readable method accumulates a plurality of a numerical data sets from a plurality of data sources to create numerical text corpus. The numerical data sets are then classified and labelled into a plurality of number format corpus. Further, a machine is trained to identify and distinguish the labels of the number format. On the basis of trained data, the computer readable method predicts an occurrence of a number format and convert the numerals into lexical characters.