Cross Rate Calculator
A cross rate is the exchange rate between two currencies that are not the US Dollar (USD). In the foreign exchange market, most currency pairs are quoted against the USD (e.g., EUR/USD, GBP/USD, USD/JPY). However, when you need to convert one currency to another that doesn't directly involve the USD, you're dealing with a cross rate. To calculate a cross rate, you typically use two exchange rates that both involve the USD.
Base Currency to USD Rate (e.g., EUR/USD):
Quote Currency to USD Rate (e.g., GBP/USD):
Amount of Base Currency to Convert:
Calculate Cross Rate
function calculateCrossRate() {
var baseCurrencyRate = parseFloat(document.getElementById("baseCurrencyRate").value);
var quoteCurrencyRate = parseFloat(document.getElementById("quoteCurrencyRate").value);
var amountToConvert = parseFloat(document.getElementById("amountToConvert").value);
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
if (isNaN(baseCurrencyRate) || isNaN(quoteCurrencyRate) || isNaN(amountToConvert)) {
resultDiv.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (baseCurrencyRate <= 0 || quoteCurrencyRate <= 0 || amountToConvert 1 EUR = 1.10 USD
// GBP/USD = 1.25 => 1 GBP = 1.25 USD => 1 USD = 1/1.25 GBP
// Substitute USD: 1 EUR = 1.10 * (1/1.25 GBP) = (1.10 / 1.25) GBP
// So, EUR/GBP = 1.10 / 1.25
var crossRate = baseCurrencyRate / quoteCurrencyRate;
var convertedAmount = amountToConvert * crossRate;
resultDiv.innerHTML =
"
Calculation Details: " +
"Base Currency to USD Rate (e.g., EUR/USD): " + baseCurrencyRate.toFixed(4) + "" +
"Quote Currency to USD Rate (e.g., GBP/USD): " + quoteCurrencyRate.toFixed(4) + "" +
"Amount of Base Currency: " + amountToConvert.toFixed(2) + "" +
"
Result: " +
"The cross rate of " + baseCurrencyRate.toFixed(4) + " / " + quoteCurrencyRate.toFixed(4) + " is approximately
" + crossRate.toFixed(6) + " (Base Currency per Quote Currency)." +
"" + amountToConvert.toFixed(2) + " of the Base Currency is equivalent to
" + convertedAmount.toFixed(2) + " of the Quote Currency.";
}
.calculator-container {
font-family: sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
max-width: 500px;
margin: 20px auto;
background-color: #f9f9f9;
}
.calculator-container h2 {
text-align: center;
margin-bottom: 20px;
color: #333;
}
.input-row {
margin-bottom: 15px;
display: flex;
flex-direction: column;
}
.input-row label {
margin-bottom: 5px;
font-weight: bold;
color: #555;
}
.input-row input[type="number"] {
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 1rem;
}
.calculator-container button {
display: block;
width: 100%;
padding: 12px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.3s ease;
}
.calculator-container button:hover {
background-color: #0056b3;
}
#result {
margin-top: 20px;
padding: 15px;
background-color: #e9ecef;
border: 1px solid #ced4da;
border-radius: 4px;
}
#result p {
margin-bottom: 10px;
color: #333;
}
#result strong {
color: #0056b3;
}