CPI Inflation Calculator
What is the Consumer Price Index (CPI)?
The Consumer Price Index (CPI) is a key economic indicator that measures the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services. It is the most widely used measure of inflation, providing a snapshot of the cost of living[attached_file:1]. This calculator uses historical CPI data to show how inflation has evolved.
How is the CPI Inflation Rate Calculated?
The inflation rate between two periods is the percentage change in the CPI. The formula is:
Inflation Rate = [(CPIEnd Year - CPIStart Year) / CPIStart Year] * 100
This calculator provides both the total (cumulative) inflation over the selected period and the average annual inflation rate, which gives a smoother picture of the long-term trend[attached_file:1].
Frequently Asked Questions (FAQ)
Why does inflation matter?
Inflation directly affects the buying power of money. When inflation is high, a dollar buys less than it did before, eroding the value of savings. Central banks, like the U.S. Federal Reserve, monitor CPI closely to guide monetary policy with the goal of maintaining price stability and sustainable economic growth[attached_file:1].
What's in the CPI "basket of goods"?
The basket is a complex collection of about 80,000 items, weighted to reflect the spending habits of a typical urban household. Major categories include housing, transportation, food and beverages, medical care, apparel, and recreation[attached_file:1].