Useful next calculations
Rates and sources
Purchasing-power illustration using the inflation rate you enter. Irish CPI is published by the CSO.
Source: CSO — Consumer Price Index. Check the linked guidance and any live quote before acting.
When to use this calculator
- When you want to see how a published inflation rate changes the real value of a sum of money.
- When you are comparing a cash amount today with the same amount in a past or future year.
- When you need a purchasing-power illustration alongside a savings or investment projection.
- When you want to convert a historic price into today’s money using a CPI-style rate.
A worked example
These are the example figures the calculator opens with.
| Input | Value |
|---|---|
| Starting Amount (€) | €10,000 |
| Annual Inflation Rate (%) | 3% |
| Years | 10 |
For those figures the calculator returns:
- Future Equivalent: €13,439.16
- Today Amount: €10,000.00
- Purchasing Power Loss: €3,439.16
- Real Value Today: €7,440.94
Method & assumptions
This calculator applies compound inflation to convert a sum of money between two points in time. Enter a published consumer price index (CPI) or equivalent annual rate for the country the cash amount belongs to. When a rate is entered, the tool applies that rate consistently across every year in the range, which is a simplification — official inflation fluctuates year to year. The result is a purchasing-power illustration, not a forecast of prices, wages, investment returns or borrowing costs.
Common mistakes
- Using a made-up inflation rate instead of a published CPI or equivalent figure.
- Treating the result as a forecast of future prices or investment returns.
- Mixing annual and monthly rates without converting them.
- Comparing two countries using inflation indexes that are not equivalent.
What to do next
- Rerun the calculation with a published local inflation rate as well as a cautious higher rate.
- Compare the result with a savings or investment projection if you are planning for a future cost.
- Keep a note of the index and period you used so the estimate can be updated.
- Do not treat this purchasing-power figure as a wage, tax or mortgage decision.