How much money would Rockefeller be worth today?

Estimating John D. Rockefeller's net worth today can be complex due to inflation and changes in the economy. However, various analyses suggest that his wealth, adjusted for inflation, could be equivalent to approximately $400 billion to $450 billion, making him one of the richest individuals in history. His fortune primarily stemmed from his ownership of Standard Oil, which dominated the oil industry in the late 19th and early 20th centuries.