**Introduction**

Geography covers a large part of the population, human socio-economic activity, and its impact analysis. Population refers to the people who live in a particular territory or region and are related to each other. It varies by space and time. The type of population growth in different countries of the world is determined by different factors. Crude birth rate is one such method of determination. The population is a very important factor for geographical boundaries. At the same time, it is one of the regulators of socio-economic development.

The rate of population growth is not the same in all parts of the world. There are different indicators of the demographic trends of the population. Crude birth rate is the most acceptable of all these indicators **(1)**.

**What is the crude birth rate?**

**The crude birth rate is the ratio of the total number of live births in a population during a given year and the total mid-year population for the same year.** It is multiplied by 1000 and is one of the main regulators of population growth in a country. Niger is the top country and having 45.21 births per 1000 population **(1)**** & (2)**.

**Some interesting features**

- This method is the most common for determining the rate of population growth.
- The nature of population growth depends on it.
- It depends on different socio-economic types such as quality of education, per capita income, family planning, religious orthodoxy, and superstition, etc.
- CBR can be
- In different countries, it varies depending on the time.
- The crude birth rate is the number of children that a certain number of people give birth to at a given time.
- It is the number of live births in a year per 1000 population.
- The regions that are more culturally developed influence the evolution of this rate
**(2) & (3)**.

**How to calculate**

**Formula**

Crude birth rate (CBR) = Total number of childbirths in one year / total population of the country * 1000.

**Example**

Suppose** , **3550 living babies are born in a year in a city. And in the middle of the year, the total population of that city was 30500.

Therefore,

The total number of childbirths in one year is = 3550

Total population of the country is = 30500

So, CBR of that country is – 3550/ 30500* 1000 = 116.

**Advantage**

- The formula is simple.
- This formula can be used to work on a small number of statistics.
- In this method, the rate of population growth is directly obtained
**(1)**.

**Disadvantage**

According to this formula, women who are unable to give birth, children, and the elderly are included in the total population of the country. For this reason, it is not reasonable to use it as an indicator of fertility **(1)**.

**Q&A**

**1. What is the crude birth rate?**

The ratio of the total number of live births in a population during a given year and the total middle year population for the same year.

**2. How to calculate crude birth rate?**

The formula is

CBR = Total number of childbirths in one year / total population of the country * 1000.

**For example **

If 15000 living babies are born in a year in a country. And in the middle of the year, the total population of that country was 1 million.

Therefore, the crude birth rate of that country is- 15000/ 1000000* 1000 = 15.

**3. How to find a crude birth rate?**

**Formula**

Crude birth rate (CBR) = Total number of childbirths in one year / total population of the country * 1000.

**Example**

If 200 living babies are born in a year in a city. And in the middle of the year, the total population of that city was 20,000.

Therefore,

The total number of childbirths in one year is = 200

Total population of the country is = 20,000

So, the CBR of that country is – 200/ 20000* 1000 = 10.

**Written By: Manisha Bharati**