Currency Appreciation / Depreciation
Measure percent change between two FX rates and see how much a base-currency amount would convert before and after the move. Always-on results with zero defaults.
Currency appreciation and depreciation measure how much one currency’s value changes relative to another over time. This calculator helps you quantify percentage moves, convert an amount from the base currency into the quote currency at old and new rates, and see the impact on purchasing power. The always-open result panel shows zeros by default so you can experiment quickly. Choose the base currency (the one you hold or pay with) and enter the old exchange rate (quote per base) plus the new exchange rate to see the percent change. If you also supply an amount in base currency, the tool shows how many units of the quote currency you could get before and after the move.
Example: If 1 USD bought 0.90 EUR before and now buys 0.95 EUR, the USD appreciated against the EUR. Percentage change = (0.95 - 0.90) / 0.90 ≈ 5.56%. An amount of $1,000 would have converted to €900 before and €950 after. Conversely, from the EUR perspective, the euro depreciated versus the dollar. The calculator reports appreciation based on the base currency you choose, keeping the interpretation consistent with the rate inputs.
Inputs: Base currency symbol selection (for display), Old rate (quote per base), New rate (quote per base), and an optional amount in the base currency to see converted amounts. Rates should use the same quote convention both times (e.g., USD/EUR as euros per dollar). If your data is inverted (e.g., dollars per euro), invert both rates or swap which currency you designate as base.
Formula: Percent change = (new - old) / old. If the result is positive, the base currency appreciated relative to the quote; if negative, it depreciated. Converted old amount = amount * old rate; converted new amount = amount * new rate. The difference shows the gain or loss in quote-currency terms purely from the exchange rate movement.
Practical uses: (1) Travelers can see how much more or less a budget buys abroad after a rate move. (2) Exporters/importers can estimate how revenues or costs shift when their home currency strengthens or weakens. (3) Investors can separate currency effects from underlying asset performance when holding foreign securities.
Limitations: This tool does not include fees or spreads; real conversions will net slightly worse rates due to transaction costs. It also does not fetch live FX data—you enter the rates you want to analyze. For more advanced scenarios (hedging costs, forward points, multi-currency portfolios), use dedicated treasury or portfolio tools.
Tips: Keep your rate convention consistent. If the percent change looks inverted from what you expect, you may be using the opposite quote direction. A quick check: if 1 USD now buys more EUR than before, USD appreciated vs EUR. If the number of quote units per base goes down, the base depreciated.
Action steps: pick display currency, enter old and new rates, optionally add an amount. Review percent change and converted amounts. Use the insight to adjust pricing, budgets, or hedging plans as needed.