Rate of Natural Increase (RNI)

Introduction to Rate of Natural Increase (RNI) Calculator

The rate of natural increase (RNI) is a demographic measure that is calculated by subtracting the crude death rate (CDR) from the crude birth rate (CBR). In this formula, RNI represents the rate of natural increase, CBR is the number of live births per 1,000 of the population per year, and CDR is the number of deaths per 1,000 of the population per year. A positive RNI indicates population growth, while a negative RNI indicates population decline.

Parameter usage:

• CBR = crude birth rate (per 1,000)
• CDR = crude death rate (per 1,000)

Output:

• RNI = rate of natural increase (per 1,000)

Data validation

The crude birth rate and crude death rate should be non-negative numbers. If either parameter is negative, an error message will be returned.

Summary

This calculator takes into account the crude birth rate and crude death rate and outputs the rate of natural increase. It provides insight into the population dynamics and growth or decline within a specific population.