Simple mathematics. Explicit assumptions.
The Carrowmont Inflation Calculator uses compound inflation to illustrate how prices and purchasing power may change over time.
Last reviewed: September 2026. This is an educational model, not a forecast of future inflation.
1. Future cost
The calculator compounds the amount you enter using your annual inflation assumption and time horizon.
2. Purchasing power of the same nominal amount
If the number of currency units stays unchanged while prices rise, its purchasing power falls. The tool estimates today's-equivalent purchasing power by discounting the nominal amount by the same inflation assumption.
3. Scenario comparison
The chart shows three scenarios: two percentage points below your entered rate, your entered rate, and two percentage points above it. The lower rate is never allowed below 0%.
4. Country and currency
Country selection controls locale-aware formatting and a default currency. Users can override the currency. The calculator does not use live foreign-exchange rates and does not convert amounts between currencies.
5. What the tool does not model
- Country-specific taxes, pensions or benefits.
- Changes in exchange rates.
- Changing inflation from year to year.
- Investment returns.
- Differences between official inflation measures and a household's personal inflation experience.
6. Interpretation
Inflation is rarely constant in real life. The tool is designed for scenario planning: change the inflation assumption and compare how sensitive the result is to different rates.