Joshi was born on 3 July 1995 in Mahesana, Gujarat to Bhanuprasad Joshi and Anilabahen Joshi. He completed his schooling from G.D High School, Visnagar in 1971. He got his Bachelor of Science from M.N College, Visnagar in 1974 and Master of Science from School of Science, Gujarat University in 1976 with Physics as one of his subjects.

Joshi married Rashmi on 22 January 1981. His son Maulik born in 1981 and his daughter Kruti in 1984. Currently, he is resident of Ahmedabad.