Give the meaning of ‘Crude Birth Rate (CBR)’. The Crude Birth Rate (CBR) is expressed as the number of live births in a year per thousand of a population. It is calculated as CBR = BiP × 1000 Where, Bi = Live births during the year, and P = Mid-year population of the area. Related posts: Was there a break between the Early Harappan and Mature Harappan phases? What Are the Climatic Conditions Required for the Growth of Rice? What is Energy? (Nutrition) What is a Repository?