$100 in 1998 → $145.41 in 2015

The U.S. dollar experienced an average inflation rate of 2.23% per year between 1998 and 2015. $100 in the year 1998 is worth $145.41 in 2015.

The inflation rate in 2015 was 0.12%.

How to calculate inflation between 1998 and 2015

Start with the CPI inflation formula:

CPI in 2015 / CPI in 1998 * 1998 USD value = 2015 USD value

Then plug in historical CPI values. The U.S. CPI was 163 in the year 1998 and 237.017 in 2015:

237.017 / 163 * $100 = $145.41

The "purchasing power" of $100 from 1998 is $145.41 in 2015.

Source: The Bureau of Labor Statistics' annual Consumer Price Index (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.

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