Inflation and purchasing power

Inflation and Purchasing Power Calculator

Adjust a value for inflation, compare two periods, see how much purchasing power money lost and what the real return of an investment was. No index is built in: the rate comes from you.

4 operationsFinance

4 operations

Adjusted value

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Difference

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Accumulated change (%)

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Fill in the fields and the result appears as you type.

Adjust for inflation

Fill in the fields and the result appears as you type.

Amount

Inflation per period (%)

Number of periodsoptional

Result

Fill in the fields and the result appears as you type.

Adjust for inflation

How this operation works

What it does: Updates a value by the accumulated inflation of the period, showing the adjusted value, the difference in money and the percentage change.
What it is for: Adjusting rent, a contract, a salary or a penalty using inflation as the reference.
When to use it: When the contract provides index-linked adjustment and you want to check the number before accepting it.
What to fill in: Original value, inflation rate per period as a percentage, and the number of periods (1 if the rate is already accumulated).
Formula: Adjusted = value × (1 + inflation ÷ 100)^periods. Difference = adjusted − value.
What each result means: Adjusted value is the updated equivalent; Difference is what was added; Accumulated change is the total percentage for the period.
Worked example: 1,500 at 0.5% a month for 12 months: 1,592.32 adjusted, a difference of 92.32 and a change of 6.15%.

Assumptions: the inflation rate is supplied by you, at the period you choose. We do not embed an official index — a number without a source and a date ages badly and misleads. Confirm the rate at your country's official source before deciding.

A mathematical simulation of the values you entered. It is not a credit offer, a return guarantee or financial advice. Assumptions: the inflation rate is supplied by you, at the period you choose. We do not embed an official index — a number without a source and a date ages badly and misleads. Confirm the rate at your country's official source before deciding.

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