Currency Exchange Rate Calculator
Understanding Currency Exchange Rates
Currency exchange rates represent the value of one currency for the purpose of trading it for another.
These rates are constantly fluctuating based on a multitude of global economic factors, including
supply and demand, inflation rates, interest rates, political stability, and trade balances between
countries. When you travel to another country or conduct international business, you'll need to
convert your money from your home currency to the local currency. The exchange rate dictates how
much of the foreign currency you will receive for a given amount of your own.
For example, if the exchange rate between the US Dollar (USD) and the Euro (EUR) is 1 USD = 0.92 EUR,
it means that one US Dollar can be exchanged for 0.92 Euros. Conversely, 1 EUR would be equivalent to
approximately 1.09 USD. This calculation is crucial for budgeting travel expenses, pricing goods
in international markets, or understanding the value of foreign investments.
Our currency exchange rate calculator simplifies this process. You input the amount you wish to convert,
select the original currency (from currency), and the target currency (to currency). The calculator then
uses current, albeit simulated for this example, exchange rates to provide you with the converted amount.
It's important to remember that actual exchange rates offered by banks or currency exchange services
may include transaction fees or slightly different rates.
How it works:
The calculator takes the 'Amount to Convert' and multiplies it by the exchange rate of the 'From Currency'
to the 'To Currency'. If the 'From Currency' is USD and the 'To Currency' is EUR, and the rate is 0.92,
then 100 USD would be converted to 100 * 0.92 = 92 EUR.
function calculateExchangeRate() {
var amountToConvert = parseFloat(document.getElementById("amountToConvert").value);
var fromCurrency = document.getElementById("fromCurrency").value;
var toCurrency = document.getElementById("toCurrency").value;
var resultElement = document.getElementById("result");
if (isNaN(amountToConvert) || amountToConvert <= 0) {
resultElement.innerHTML = "Please enter a valid positive amount to convert.";
return;
}
// This is a simplified, static set of exchange rates for demonstration purposes.
// In a real-world application, these rates would be fetched from a live API.
var exchangeRates = {
"USD": {
"EUR": 0.92,
"GBP": 0.80,
"JPY": 150.00,
"CAD": 1.35,
"AUD": 1.50
},
"EUR": {
"USD": 1.09,
"GBP": 0.87,
"JPY": 163.00,
"CAD": 1.47,
"AUD": 1.63
},
"GBP": {
"USD": 1.25,
"EUR": 1.15,
"JPY": 187.00,
"CAD": 1.69,
"AUD": 1.87
},
"JPY": {
"USD": 0.0067,
"EUR": 0.0061,
"GBP": 0.0053,
"CAD": 0.0090,
"AUD": 0.0100
},
"CAD": {
"USD": 0.74,
"EUR": 0.68,
"GBP": 0.59,
"JPY": 111.00,
"AUD": 1.11
},
"AUD": {
"USD": 0.67,
"EUR": 0.61,
"GBP": 0.53,
"JPY": 100.00,
"CAD": 0.90
}
};
var rate;
if (fromCurrency === toCurrency) {
rate = 1;
} else {
rate = exchangeRates[fromCurrency][toCurrency];
}
if (rate === undefined) {
resultElement.innerHTML = "Exchange rate data not available for this pair.";
return;
}
var convertedAmount = amountToConvert * rate;
resultElement.innerHTML = amountToConvert + " " + fromCurrency + " is equal to " + convertedAmount.toFixed(2) + " " + toCurrency;
}
#exchange-rate-calculator-wrapper {
font-family: sans-serif;
max-width: 600px;
margin: 20px auto;
padding: 20px;
border: 1px solid #ddd;
border-radius: 8px;
background-color: #f9f9f9;
}
#exchange-rate-calculator-wrapper h2 {
text-align: center;
color: #333;
margin-bottom: 20px;
}
.calculator-inputs {
display: grid;
grid-template-columns: 1fr;
gap: 15px;
margin-bottom: 20px;
}
.input-group {
display: flex;
flex-direction: column;
}
.input-group label {
margin-bottom: 5px;
font-weight: bold;
color: #555;
}
.input-group input[type="number"],
.input-group select {
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1em;
}
#exchange-rate-calculator-wrapper button {
padding: 12px 20px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 1.1em;
transition: background-color 0.3s ease;
}
#exchange-rate-calculator-wrapper button:hover {
background-color: #0056b3;
}
.calculator-result {
margin-top: 20px;
padding: 15px;
background-color: #e9ecef;
border: 1px solid #ced4da;
border-radius: 4px;
text-align: center;
font-size: 1.2em;
color: #333;
font-weight: bold;
}
.calculator-explanation {
margin-top: 30px;
border-top: 1px solid #eee;
padding-top: 20px;
font-size: 0.95em;
line-height: 1.6;
color: #666;
}
.calculator-explanation h3 {
color: #333;
margin-bottom: 10px;
}
.calculator-explanation p {
margin-bottom: 15px;
}