Price index inflation rate
Prices & Inflation. GDP Price Index. Measures changes in prices paid for goods and services produced in the United States. GDP Price Deflator. A price measure very similar to the GDP price index. Gross Domestic Purchases Price Index. BEA’s featured measure of price changes in the U.S. economy overall. Calculating Annual Inflation Rates. Annual rates of inflation are calculated using 12-month selections of the Consumer Price Index which is published monthly by the Labor Department’s Bureau of Labor Statistics ().. For example, to calculate the inflation rate for January 2017, subtract the January 2016 CPI of "236.916" from the January 2017 CPI of "242.839."