# Convert USD2005 PPP per-capita GDP to USD2011 PPP per-capita GDP for a number of countries

Which conversion factor / formula should be used to convert USD2005 PPP per-capita GDP to USD2011 PPP per-capita GDP for different countries?

I have found an identical question, but without a clear, satisfactory answer here: Conversion of GDP PPP International \$2005 into GDP PPP International \$ 2011

• Is the ratio of values from PPP2011 to PPP2005 the same? (Comparing between values from the same year.) – ahorn Mar 9 '19 at 4:54