U.S. Inflation Calculator with Monthly CPI Data
Convert an original dollar amount between observed U.S. CPI months, inspect the price-index ratio, chart and missing-data notes.
This tool uses a frozen monthly U.S. CPI snapshot through September 2026. October 2025 is unavailable. Amounts are USD, with no FX conversion.
Calculation inputs
Result and calculation basis
Original amount adjusted along observed CPI months
This is the CPI-adjusted original amount, not a wage or investment performance path. Missing observations create a break. The vertical axis is cropped to the observed range; use the table for exact displayed values.
Inspect all periods and monetary values
Export or restore a calculation
Print includes summary, chart and assumptions. Open the period table before printing to include every row. The JSON restores inputs and recomputes with the same snapshot; no saved result total is trusted.