Calculadora de Inflação
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
valor_corrigido = valor × (1 + IPCA)^anos
About this calculator
The Inflation Calculator adjusts the purchasing power of a monetary amount over time using the IPCA (Broad National Consumer Price Index) as reference. The calculation uses the formula: adjusted value = original value × (1 + IPCA)^years. This helps you understand how much a past amount would be worth today, or vice versa, considering accumulated inflation. The tool is useful for financial planning, comparing historical prices, and adjusting contracts.
To use the calculator, enter the original amount, annual inflation rate (in %), and number of years. The result shows the adjusted value needed to maintain the same purchasing power. For example, R$ 1,000.00 with 5% annual inflation over 10 years becomes approximately R$ 1,628.89. You can also calculate currency devaluation: subtract the original value from the adjusted to see the real loss.
When to use? In situations like rent adjustments, calculating real investment returns, updating values in legal proceedings, or comparing prices from different eras. Remember that actual inflation may vary by region and income bracket; IPCA is a national average. For more precise calculations, consider specific indices like INPC or IGP-M depending on context.
Cautions: the calculator assumes constant inflation, which rarely occurs in practice. For long periods, use the average inflation rate or calculate year by year. Also, ensure the rate entered is annual (e.g., 5% per year), not monthly. The tool does not account for taxes or fees, only the inflation effect.
Frequently asked questions
What is the difference between IPCA and INPC?
IPCA measures inflation for families with income from 1 to 40 minimum wages, while INPC focuses on families with income from 1 to 5 minimum wages. IPCA is the official government index for inflation targets.
Can I use this calculator to adjust rent values?
Yes, but check if your contract specifies IPCA or another index. Many contracts use IGP-M or INPC. The calculator serves as a reference, but the correct index should be from the contract.
How do I calculate accumulated inflation over several years?
The calculator does that: enter the original value, average annual rate, and number of years. If you have different rates each year, calculate year by year or use the geometric mean.
Is real inflation always equal to IPCA?
No. IPCA is a national average; your personal inflation may differ depending on your consumption habits. For a personal estimate, consider the items you consume most.
What does 'purchasing power' mean?
It is the amount of goods and services a monetary amount can buy. With inflation, the same amount buys less over time. The calculator shows how much would be needed to maintain the same purchasing power.