<P> According to current projections , the global population will reach eight billion by 2024 , and will likely reach around nine billion by 2042 . Alternative scenarios for 2050 range from a low of 7.4 billion to a high of more than 10.6 billion . Projected figures vary depending on underlying statistical assumptions and the variables used in projection calculations , especially the fertility variable . Long - range predictions to 2150 range from a population decline to 3.2 billion in the `` low scenario '' , to `` high scenarios '' of 24.8 billion . One extreme scenario predicted a massive increase to 256 billion by 2150 , assuming the global fertility rate remained at its 1995 level of 3.04 children per woman ; however , by 2010 the global fertility rate had declined to 2.52 . </P>
<P> According to current projections , the global population will reach eight billion by 2024 , and will likely reach around nine billion by 2042 . Alternative scenarios for 2050 range from a low of 7.4 billion to a high of more than 10.6 billion . Projected figures vary depending on underlying statistical assumptions and the variables used in projection calculations , especially the fertility variable . Long - range predictions to 2150 range from a population decline to 3.2 billion in the `` low scenario '' , to `` high scenarios '' of 24.8 billion . One extreme scenario predicted a massive increase to 256 billion by 2150 , assuming the global fertility rate remained at its 1995 level of 3.04 children per woman ; however , by 2010 the global fertility rate had declined to 2.52 . </P>
when is the world population expected to reach 8 billion
when is the world population expected to reach 8 billion
2024
2024