Currency Value Over Time Calculator
A currency’s purchasing power falls over time as inflation pushes prices up. This calculator shows two sides of that for travellers and expats holding savings: what a today-priced item will cost in the future, and what a today’s amount will be worth in real terms after inflation.
Enter an amount, an average annual inflation rate for that currency (2–3% is typical in many developed economies; higher in volatile ones), and a number of years. The result shows the inflated future cost and the eroded real value of today’s amount.
It is the long view on money — the calculation that shows why cash held too long in any currency quietly shrinks, and why returns need to at least match inflation just to stand still.
Enter your values to see the result.
How this is calculated
The calculator shows two effects of inflation on a currency. The future cost is what a today-priced basket of goods will cost in the future, calculated as the amount times (1 plus the inflation rate) raised to the number of years. The real value is what today’s amount will be worth in purchasing-power terms after inflation, calculated as the amount divided by (1 plus the inflation rate) raised to the years. The purchasing-power loss is the percentage drop from the original amount to the real value.
Inflation here is the domestic inflation rate for the currency in question — the rate at which prices in that currency rise, eroding its purchasing power. It is distinct from exchange-rate depreciation, which is the currency’s value relative to other currencies. High inflation often pressures a currency to depreciate, but the two are separate effects measured by different tools.
The model uses a constant annual rate, which is a planning simplification — real inflation varies year to year and can spike or fall. For long horizons, use a conservative multi-year average rather than a single recent year. The calculator does not account for returns earned on the amount (which could offset inflation) or for taxes on those returns.
Worked example
$1,000 held for 10 years at 3% annual inflation.
- 1Future cost = 1,000 × 1.03¹⁰ ≈ $1,344 — what $1,000 of goods will cost then.
- 2Real value = 1,000 ÷ 1.03¹⁰ ≈ $744 — what today’s $1,000 will be worth.
- 3Purchasing-power loss ≈ 25.6% over the decade.
Frequently asked questions
- What inflation rate should I use?
- Use a recent multi-year average for the currency in question. Many developed economies target around 2%; emerging economies may run higher. Long planning horizons should use a conservative average, since inflation varies year to year.
- Why does my saved money lose value?
- If your savings earn less than inflation, their real purchasing power falls. To preserve value, your return needs to at least match inflation — which is why holding large cash balances long-term is risky in any currency.
- Is this the same as exchange-rate depreciation?
- No. Inflation reduces domestic purchasing power; exchange rates move relative to other currencies. High inflation often pressures a currency to depreciate, but the two are distinct effects measured by different tools.
- What inflation rate should I use?
- A recent multi-year average for the currency in question. Many developed economies target around 2%; emerging economies may run higher. For long horizons, use a conservative average, since inflation varies year to year and can spike.
- Is this the same as the currency weakening on exchange markets?
- No. Inflation erodes domestic purchasing power; exchange rates move relative to other currencies. They are related — high inflation often pressures depreciation — but they are distinct effects, and this calculator measures only the inflation side.
Related calculators
Method: future cost = amount × (1 + rate)^years; real value = amount ÷ (1 + rate)^years. No external data source for the method. Last updated: September 2026.
These results are indicative estimates for planning only and do not constitute financial advice. Exchange rates, tax rules, customs allowances and tipping customs vary by country, provider and over time. Always confirm figures with your bank, the relevant authority or a qualified adviser before acting on a calculation.