Trailing 12-month CPI
Bureau of Labor Statistics
Bureau of Labor Statistics (2016)
The inflation rate is determined by Consumer Price Index released by the U.S. Bureau of Labor Statistics (BLS). The most recent official statistics were announced by the BLS in December 2017. The information displayed is raw data, not seasonally adjusted.
To convert prices while accounting for inflation, use our inflation calculator.
Inflation Rate Chart
This graph of historical inflation rates is generated using the average yearly value of inflation since 1913, as reported by the U.S. government Bureau of Labor Statistics. Inflation is the rate of change of the Consumer Price Index (CPI).
The years with the largest changes in pricing were 1917 (15.12%), 1918 (14.78%), and 1920 (13.51%). Note that the value for 2017 is an estimation based on quarterly and monthly reports, as the official average for a year is not released until the following year.
Inflation Rate Table
This table shows the inflation rate on a monthly basis. The monthly inflation rate is determined by computing the rate of change in Consumer Price Index over a trailing 12-month period.
Inflation Rate Formula
To compute inflation, start with the inflation rate formula:
CPI in Y2 * Y1 USD value = Y2 USD value
For example, if you wanted to convert dollar amounts in the year 2000 to dollar amounts in the year 2017:
CPI in 2017 * 2000 USD value = 2017 USD value
Next, we plug in historical CPI values. The U.S. CPI was 172.2 in the year 2000 and 244.786 in 2017:
244.786 * $100 = $142.15
Therefore, $100 in 2000 has the same "purchasing power" as $142.15 in 2017.