[3] Kantawala studied at the Cambay High School and Gujarat College in Ahmedabad.
[1] Kantawala graduated in mathematics with highest distinctions and was awarded the 'Daxina Fellowship' by the University of Bombay.
[3] Kantawala enrolled as an advocate on the Appellate side of the High Court of Bombay in 1941 and joined its Original side after clearing his Advocate's O.S.
S. T. Desai and Hormasji Maneckji Seervai were two of the examiners for this purpose.
Kantawala worked in the chambers of Natwarlal H. Bhagwati who went on to become a Justice at the Supreme Court of India later.