How do you find the growth rate of a population?

Population Growth Rate = (births+Immigration) - (deaths + emigration)

_______________________________________ X 100 Initial Population

Growth rate = Birth Rate - Death Rate + immigration rate - emigration rate

Growth rate = (population at end of period - population at beginning of period) / (population at beginning or period)

There is a formula here in the Related link below that the U. S. Census Bureau uses to produce national estimates.