Beckman was born in Cullom, Illinois, a village of about 500 people in a farming community. He was the youngest son of George Beckman, a blacksmith, and his second wife Elizabeth Ellen Jewkes. He was curious about the world from an early age. When he was nine, Beckman found an old chemistry textbook, Joel Dorman Steele's "Fourteen Weeks in Chemistry", and began trying out the experiments. His father encouraged his scientific interests by letting him convert a toolshed into a laboratory.