Compare an amount between two dates: its stated value, what it can buy and its share of all money. Useful for savings or a resale, with clearly identified projections up to 2100.
For savings or a resale, distinguish the stated amount, what it can buy and its slice of the money pie. Then choose the dates and benchmark that match your question. A future year remains a scenario.
That's the increase in current euros, the number you see first.
The calculator compares this increase with the selected monetary measure between the two dates. A second benchmark compares prices using official inflation. Central banks supply monetary data; Eurostat supplies, among other data, euro-area countries’ price indices.
Purchasing power asks: what can I buy? Monetary share asks: what fraction of all money do I hold? The Inflation button answers the first question. M1, M2 and M3 answer the second.
A basket rises from €100 to €110: a 10% increase. You now need €110 to buy the same basket. If you keep €100, it buys what €90.91 bought before, because 100 ÷ 1.10 = 90.91. Your balance remains €100; the amount it can buy changes.
You hold €1,000 in a €10,000 money pie: your share is 10%. If the pie grows to €20,000 while you keep €1,000, your share falls to 5%. Keeping 10% would require €2,000. Your account still holds €1,000: a smaller share does not mean that money was taken away or that prices doubled.
The gain in currency is the sale price minus the initial investment. The price-adjusted result then compares it with the average basket. The money-supply-adjusted result is a separate comparison. Do not add them together. Fees, taxes and intermediate income can change your personal result.
For a past year the calculation uses the average of available observations. For the latest data year it uses the last observation, not an incomplete annual average. Future years extend a past rate and carry a ~ sign: they are scenarios, not forecasts. Choosing a country in euros changes its inflation only.