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Inflation estimate calculator
Explore how an assumed inflation rate changes costs.
On this page
Estimated future cost1,343.92
Purchasing power of current amount744.09
Calculator controls
How to calculate
Explore how an assumed inflation rate changes costs.
Future cost = current cost × (1 + rate)^years
Worked example
Current cost: 1000; Assumed annual inflation (%): 3; Years: 10.
Estimated future cost: 1,343.92 ; Purchasing power of current amount: 744.09 .
Assumptions and limits
Uses your constant assumed rate, not live inflation data or a forecast.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Future cost shows how a price could grow at your assumed constant inflation rate. Purchasing power expresses the current amount in today’s spending terms after that erosion.
When this tool is useful
Stress-test a long-term budget using different hypothetical inflation rates.
Understanding your inputs
| Input | What to enter |
|---|---|
| Current cost | Enter a number of at least 0 and no more than 1000000000000. |
| Assumed annual inflation (%) | Enter a number of at least 0 and no more than 100. |
| Years | Enter a number of at least 0 and no more than 100. |
Frequently asked questions
Does the calculator fetch official inflation data?
No. You supply the rate. It is a scenario, not a current inflation report or forecast.
Why is purchasing power lower?
At a positive inflation rate, the same nominal amount buys fewer goods and services over time.