How can you calculate human population growth?

Question

Julian Aguilar · Accepted Answer

Population growth is exponential. But there is an upper limit.

Your final population (P), your original (at starting population) population (#P_0#), and you have a period such as 10 years, 50 years between your records. The population is growing exponentially. #P=P_0*e^(r*t)# where r is the coefficient of population growth rate. For example, there were 17 years between 2000 and 2017, and the population in 2017 was 7.4 billion (you can view this number by visiting census.gov). In 2000, there were 6 billion people living in the world. Right now, r is #ln(7.4/6)=r*17# #r=0.073# or #r=7.3%# This is a 17-year period with a constant population growth rate. 10.5 billion is the carrying capacity (of this planet), according to some scientists; however, some countries exceed this limit by causing harm to the biosphere.

Piper Anderson · Answer

undefined The exponential growth formula, which is as follows: Population = Initial Population × (1 + Growth Rate)^Number of Time Periods, can also be written as follows: Population = Initial Population × e^(Growth Rate × Time). Here, Initial Population is the population's starting size; Growth Rate is the population's rate of increase (expressed as a decimal); Number of Time Periods or Time is the duration over which the population is growing; and e is the base of the natural logarithm, or roughly equal to 2.71828.