Enter the number of births, the number of deaths, and the population size into the Net Reproductive Rate Calculator. The calculator will evaluate the Net Reproductive Rate.

## Net Reproductive Rate Formula

The following formula is used to calculate the Net Reproductive Rate.

NRR = (B-D) / P * 100
• Where NRR is the Net Reproductive Rate (%)
• B is the number of births
• D is the number of deaths
• P is the population size

To calculate the net reproductive rate, subtract the number of deaths from the number of births, divide this result by the population size, then multiply by 100.

## How to Calculate Net Reproductive Rate?

The following two example problems outline the steps and information needed to calculate the Net Reproductive Rate.

Example Problem #1

1. First, determine the number of births.
• The number of births is calculated to be : 5,000.
2. Next, determine the number of deaths.
• The number of deaths is measured to be: 3,000.
3. Next, determine the population size.
• The population size is found to be: 100,000.
4. Finally, calculate the Net Reproductive Rate using the formula above:

NRR = (B-D) / P * 100

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

NRR = (5000-3000) / 100,000 * 100 = 2.00 (%)

Example Problem #2

The variables required for this problem are provided below:

number of births = 5,000

number of deaths = 4,000

population size = 200,000