Enter the total number of live births and the total midyear population into the Crude Birth Rate Calculator. The calculator will evaluate the Crude Birth Rate. 

Crude Birth Rate Formula

The following two example problems outline the steps and information needed to calculate the Crude Birth Rate.

CBR = LB / MP * 1000

  • Where CBR is the Crude Birth Rate (births/1000 people)
  • LB is the total number of live births 
  • MP is the total midyear population 

How to Calculate Crude Birth Rate?

The following example problems outline how to calculate Crude Birth Rate.

Example Problem #1:

  1. First, determine the total number of live births. 
    • The total number of live births is given as: 4,000.
  2. Next, determine the total midyear population. 
    • The total midyear population is provided as: 250,000.
  3. Finally, calculate the Crude Birth Rate using the equation above: 

CBR = LB / MP * 1000

The values provided above are inserted into the equation below and computed.

CBR = 4,000 / 250,000 * 1000 = 16 (births/1000 people)


Example Problem #2: 

For this problem, the variables required are provided below:

total number of live births = 5,000

total midyear population = 300,000

Test your knowledge using the equation and check your answer with the calculator..

CBR = LB / MP * 1000 = ?