The U.S. dollar experienced an **average inflation rate** of 1.78% per year between 2005 and 2017. $100 in the year 2005 is worth $123.58 in 2017.

The **current inflation rate** in 2017 is 1.08%^{1}.

**How to calculate inflation since 2005**

Start with the CPI inflation formula:

CPI in 2017 / CPI in 2005 * 2005 USD value = 2017 USD value

Then plug in historical CPI values. The U.S. CPI was 195.3 in the year 2005 and 241.353 in 2017:

241.353 / 195.3 * $100 = **$123.58**

The "purchasing power" of $100 from 2005 is $123.58 in 2017.

**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.