Interactive Population Projection
This interactive chart shows estimates and probabilistic projections of total world population as published by the United Nations in their 2017 Revision of the World Population Prospects. Use the slider below to see how changes in the fertility rate affect the population projections. Roll over the lines to see the observed or estimated population for a given year. The static lines on the graph indicate the median projection (orange line), 80 percent prediction interval (green lines) and 95 percent prediction intervals (red lines). For a full explanation of the model and methodology visit the UN Population Division.