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Inflation Calculator

See how much a past amount is worth today using IPCA or IGP-M.

How to use

  1. Enter the original amount and the start and end dates (month/year).
  2. Choose the inflation index: IPCA (consumer prices, most common) or IGP-M (general prices, used in rent contracts).
  3. See the corrected amount and the accumulated inflation over the period.

About this tool

Adjusts a past monetary value for inflation using official Brazilian indices. IPCA (Índice Nacional de Preços ao Consumidor Amplo) is the headline consumer price index; IGP-M (Índice Geral de Preços — Mercado) is commonly used in rent adjustments and financial contracts.

The index data is fetched from an external API that mirrors IBGE and FGV publications. The amount and dates you enter are sent to this server for the calculation — no other personal data is transmitted.

The tool adjusts for past inflation only. It does not forecast future purchasing power. For rent adjustments, check which index your contract specifies — applying the wrong one can lead to legal disputes.

Frequently asked questions

Does my data leave my browser?

No. Everything runs locally in JavaScript on your device — nothing is transmitted or stored.

Is it free?

Yes. Pick any two dates and see how much a value changed according to the official IPCA index — no signup needed.

Which official tables does the tool use?

The tool uses the latest publicly available rates and tables. You can verify the values against the official sources linked on the page.

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