# How is density of population measured?

The density of population is the ratio between the numbers of people to the size of land. It is usually measured in persons per sq.km. For example, the area of Region X is 100 sq km and the population is 1,50,000 persons. The density of population is calculated by dividing 1,50,000 by 100. The density of population is equal to 1,500 person/sq km.