About this calculatorThe data used in this calculator was provided by the Brookings Institution from its analysis of the global middle class, covering 97 percent of the world’s population. Brookings uses a per-person, per-day income threshold of between 11 and 110 U.S. dollars to determine the global middle class. The number of people in the global middle class in this calculator differs from the number in the Brookings report because of additional adjustments to the data made in the report. Only income deciles are available at the country level, so user-entered income is rounded up or down to the nearest decile mean. Income is also adjusted for relative purchasing power in the country selected using the World Bank’s most recently available PPP conversion factors.

Source: Washington Post August 20, 2018 14:37 UTC