Gujar was born on 1 May 1953 in Gurlan village of Rajasthan. He is son of Rupi Devi Gujar and Ganga Ram Gujar.[3] He belonged to a poor family and both his parents were farmers. He completed his primary education from village Gurlan and he completed his middle education in another village of Rajasthan, named Gatarmala. Then he completed his secondary education from Pur Secondary School.[4] Then he took admission in MLV Government College in Bhilwara and completed his Pre University Class. He continued his studies in the same college up to BA(Hon's) LLB in 1976. Then he started practising in Bhilwara District Court and served as an advocate.
Kalu Lal is married to Saroj Devi Gujar. She served as the Pradhan of Panchayat SamitiSuwana for 2 consecutive terms (10 years). She was the first BJP (Non- Congress) Pradhan since Independence.
The Couple have four daughters.