Calculator

What is your money really worth?
Measure the erosion.

See how much purchasing power a dollar amount has lost (or gained) between any two years.

Enter an amount and year range to see the result.
How this is calculated

CPIConsumer Price Index (CPI)The government's measure of how much a typical basket of consumer goods costs over time.Full definition data is loaded from /data/cpi.json. The equivalent value is calculated as:

equivalent = amount × (CPIend / CPIstart)

The percentage change represents cumulative inflationinflationA general increase in prices over time, meaning each dollar buys less than it did before.Full definition (or deflationdeflationA general decrease in prices across the economy. Can happen from increased productivity or collapsed demand.Full definition) over the period. A positive number means prices rose; the same dollars buy less.

Last updated 2026-06-03 · Verify · Disclosures · Pairs with /inflation-types/

This is the quick version. The free Command Center workbook runs this math inside your whole financial picture: one input spine, a 2026 tax engine, and 23 built-in self-tests. Note: this tool uses actual historical CPI; the workbook projects forward from the current CPI snapshot.