The crude birth rate is calculated by dividing the number of the total population by the number of births in one year, according to Columbia University. The CBR of a population can be used to assign a stage of development.
According to Columbia University, a CBR of around 40.4 would label a country as "least developed." A CBR of around 23.1 labels a country as "developing" and a CBR of around 11.2 labels a country as "developed."
Crude birth rate can be a good measure of the fertility of a given population. However, the value does not take into account factors that might influence fertility, such as marrying age.