CBR (Crude Birth Rate) is calculated as.

$CBR=\frac{Bi}{p} \times 1000$ $CBR=\frac{Bi}{p} \times 10,000$ $CBR=\frac{Bi}{p} \times 1,00,000$ $CBR=\frac{p}{Bi} \times 10,000$

$CBR=\frac{Bi}{p} \times 1000$

The crude birth rate (CBR) is expressed as number of live births in a year per thousand of population. It is calculated as: $CBR=\frac{Bi}{p} \times 1000$ Here, CBR = Crude Birth Rate; Bi = live births during the year; P=Mid year population of the area.