$1 in 1940 → $17.40 in 2017

The U.S. dollar experienced an average inflation rate of 3.78% per year between 1940 and 2017. $1 in the year 1940 is worth $17.40 in 2017.

The current inflation rate in 2017 is 1.50%1.


U.S. inflation from 1913 to 2017


How to calculate inflation since 1940

Start with the CPI inflation formula:

CPI in 2017 / CPI in 1940 * 1940 USD value = 2017 USD value

Then plug in historical CPI values. The U.S. CPI was 14 in the year 1940 and 243.603 in 2017:

243.603 / 14 * $1 = $17.40

The "purchasing power" of $1 from 1940 is $17.40 in 2017.


Source: The Bureau of Labor Statistics' annual (CPI), established in 1913. Inflation data from 1665 to 1912 is sourced from a historical study conducted by political science professor Robert Sahr at Oregon State University.


» Read more about inflation.