Inflation and purchasing power calculator
Project a future equivalent price and purchasing-power loss using a constant annual inflation rate.
- 100% local
- Instant
- Free
- No account
- Works offline
Constant-rate projection only; this is not an economic forecast.
Why use this tool?
This projection illustrates purchasing-power erosion when prices rise at a constant annual rate. It helps reason in future money without pretending to forecast real inflation.
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Your data stays on your device and is never sent to our servers.
Smart processing
Calculate and compare financial scenarios with clear indicators and explicit formulas.
Supported formats
Amounts, rates, terms and financial assumptions depending on the calculator.
Save time
Get a clean, ready-to-use result in seconds without installing software or configuring a complex workflow.
Fonctionnement
How does this tool work?
The calculator compounds the selected annual inflation rate on the starting amount. Each projected year therefore builds on the previous year’s price level. Future equivalent cost shows how much would be needed to purchase the same basket later, while future purchasing power shows the opposite effect on a nominal amount that does not increase. This is a mathematical constant-rate scenario, not an economic forecast.
Use cases
Long-term budgeting
Estimate the scale of a future expense if prices rise at the annual rate you selected.
Savings target
See how much a future amount may need to grow to preserve comparable purchasing power.
Scenario comparison
Try several inflation assumptions to understand how small annual differences accumulate over time.
Guide
How to use this tool
- 1
Enter the current amount
Provide the price, budget or balance whose purchasing power you want to examine.
- 2
Choose the rate
Enter an assumed annual inflation percentage for the scenario.
- 3
Set the duration
Choose the number of years to project future cost and purchasing power.
Tips and best practices
- Compare several rates instead of relying on one scenario.
- Treat the result as a projection rather than a forecast.
- Keep the same currency when comparing amounts.
Frequently asked questions
Is this a forecast?
No. The calculator simply applies the constant rate you enter and does not predict actual future prices, monetary policy or economic conditions.
Why does purchasing power fall?
When prices rise while a nominal amount stays unchanged, that amount can buy fewer goods and services, so its real purchasing power decreases.
What formula is used?
Future equivalent cost uses annual compounding: amount × (1 + rate)^duration. Purchasing power applies the inverse effect for the same scenario.
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