Private, source-first worksheet

Model inflation without stale country-rate presets.

Bring one recent annual CPI or inflation rate, name its publisher, and see a constant-rate price and purchasing-power scenario. The tool does not fetch, guess or recommend a rate.

No bundled country ratesNo live-data claimNo forecastNo AI or network send

Lire en français.

Build one sourced scenario

Use the rate's exact geography and period. Do not treat headline CPI as the price change of every household or product.

Do not paste private financial information.

Method

Price equivalent = amount × (1 + annual rate)years. Purchasing power = amount ÷ the same factor. The entered rate stays constant.

Official context

World Bank indicator metadata defines CPI inflation as the annual percentage change in the cost of a representative basket and identifies its source and periodicity.

Privacy boundary

No input is stored, placed in a URL, or sent to analytics, AI or an API. Exports are created locally.