What this calculator does
Measure the appreciation or depreciation of a base currency when its quoted exchange rate changes.
How it works
The calculator evaluates base appreciation = (new quote rate − old quote rate) ÷ old quote rate × 100%. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
3-
?oldRate=Old quote rateNumber · Required · Default: 1.1
-
?newRate=New quote rateNumber · Required · Default: 1.2
-
?baseAmount=Base-currency amountNumber · Required · Default: 1,000
Outputs
5-
baseCurrencyChangeBase currency changePercentage · Primary output
-
quoteCurrencyInverseChangeQuote currency change versus basePercentage
-
oldQuoteValueOld quote-currency valueNumber
-
newQuoteValueNew quote-currency valueNumber
-
changeTypeBase currency movementText
Inputs and results
The inputs are Old quote rate, New quote rate, Base-currency amount. Results include Base currency change, Quote currency change versus base, Old quote-currency value, New quote-currency value, Base currency movement.
Important notes
This calculator does not retrieve live exchange rates. Enter rates quoted on the same basis.