A basic demographic formula used to estimate total population change between two points in time — or to estimate any unknown component of population change, provided that the other components are known. The balancing equation includes all components of population change: births, deaths, immigration, emigration, in-migration, and out-migration.

A basic demographic calculation used to see how a population changes with the impacts of natural increase and migration. The Balancing Equation is:   Population= Births – Deaths + Total Net Migration