Finance Formula • Published on July 30, 2026 • Last updated August 09, 2026
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Total cost of representative consumer basket in target year
Total cost of exact same basket in benchmark base year
Consumer Price Index value (Base year value = 100)
The Consumer Price Index (CPI) measures the average change over time in prices paid by urban consumers for a market basket of consumer goods and services.
A CPI of 100 represents the base year reference benchmark.
CPI is published monthly by national statistical organizations.
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