How to Calculate Crude Birth Rate

How to Calculate Crude Birth Rate
••• monkeybusinessimages/iStock/GettyImages

Crude birth rate represents the childbirths per 1,000 people each year. This is a common measure of fertility for a given population. Statiticians use the crude birth rate in population geography and demography because it is a useful indicator in studies of population around the world. The crude birth rate could be of concern for particular countries who may be experiencing population decline or for national governments who are worried about population growth rates that are higher than their country can sustain.

TL;DR (Too Long; Didn't Read)

The crude birth rate is considered "crude" because is ignores the age structure of the population and it doesn't take into account who among the population were actually able to give birth.

    The crude birth rate (CBR) is equal to the number of live births (​b​) in a year divided by the total midyear population (​p​), with the ratio multiplied by 1,000 to arrive at the number of births per 1,000 people.

    The formula for crude birth rate is:

    \text{CBR} = \frac{b}{p} × 1,000

    For example, in 2007, there were 3,250 births in a city with population of 223,000. Therefore:

    \text{CBR} = \frac{3,250}{223,000} × 1,000 = 14.57

    So, there were 14.57 births for every 1,000 people in the city.

Related Articles

How to Calculate Incidence & Prevalence
How to Calculate a Demographic Percentage
How to Calculate Per Capita
How to Calculate a Growth Trend
How to Estimate the True Proportion
How to Compute a Population Mean
Importance of Sample Size in Research
Life Cycle of a Manatee
What Type of Sample Is Used for Probability?
Examples Of Deforestation
How to Calculate Population Projections
What Is the Difference Between Exponential & Logistic...
How to Create a Population Density Map
How to Convert a Percent to an Odds Ratio
How to Calculate Exceedance Probability
What Is a Nominal Variable?
How to Calculate Loading Rates
Interesting Facts About Baby Wolves
Methane Gas Vs. Natural Gas
How to Calculate Absolute Change

Dont Go!

We Have More Great Sciencing Articles!