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Inflation Purchasing Power Calculator
Show the nominal cost and unchanged-cash purchasing power under an entered inflation assumption.
Amount in base-year currency, Assumed annual inflation (%), Whole elapsed years
JSON
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter the labelled values using the displayed units and explicit assumptions.
- Choose Calculate result and review the complete report and any undefined or no-solution states.
- Choose Download result to save the complete JSON. Reset clears the result and restores example controls.
Examples
Amount in base-year currency: 1000
Assumed annual inflation (%): 3
Whole elapsed years: 10
Limitations
- Nonnegative amount,constant annual inflation>-100% to100%,whole years0–100. Annual schedule of equivalent future cost,original cash in base-year purchasing power and cumulative index. No CPI lookup,country basket or observed inflation claim. Supported annual percentage lower bound is-99.999999999;nonfinite/underflow-derived reports refuse.
- Scalar controls accept explicit finite decimal syntax;positive values normally1e-12–1e12,nonnegative0–1e12 unless a narrower range is stated. JSON numeric rows use finite IEEE754 values within their stated bounds. Derived counts above1billion and nonfinite results refuse. Combined input<=400000UTF8 bytes;complete JSON<=4MiB. All processing stays in your browser.
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