Inflation Calculator
Data source, formula, and limits
The page uses U.S. Bureau of Labor Statistics CPI-U annual averages for all items, U.S. city average. It converts historical buying power only; it does not forecast future inflation or provide financial advice.
FAQ
What data source does this use?
It uses the U.S. Bureau of Labor Statistics CPI-U series for all items, U.S. city average, stored as annual averages through 2024.
What is the inflation formula?
Adjusted amount equals amount multiplied by the end-year index divided by the start-year index.
Can I use this as a forecast?
No. The calculator compares historical index values only. It does not forecast future inflation.
How often should the data be updated?
The BLS CPI-U source is released monthly. This page stores annual averages and should be refreshed when a new annual average is ready.