An exchange rate, also known as a foreign exchange rate, is the value of one currency for the purpose of conversion to another.
For example, if the exchange rate between the United States Dollar (USD) and the Euro (EUR) is 0.92, it means that 1 USD is worth 0.92 EUR.
Conversely, if you want to know how many USD are in 1 EUR, you would typically look at the inverse rate, which would be approximately 1 / 0.92 ≈ 1.087 USD per EUR.
This calculator helps you quickly determine the equivalent value of an amount from one currency to another using a specified exchange rate. It's an essential tool for travelers, international businesses, investors, and anyone dealing with multiple currencies.
How the Calculator Works:
The fundamental calculation for currency conversion is a simple multiplication:
Converted Amount = Amount to Convert × Exchange Rate
For example, if you want to convert 100 USD to EUR and the exchange rate is 1 USD = 0.92 EUR:
The calculator takes the 'Amount to Convert', the 'From Currency', the 'To Currency', and the specific 'Exchange Rate' (defined as how much of the 'To Currency' you get for one unit of the 'From Currency') and applies this formula to provide the converted amount.
Use Cases:
Travel: Quickly estimate how much local currency you'll get for your home currency.
International Business: Calculate the cost of goods or services in a foreign currency or the revenue received from overseas sales.
Investment: Track the value of foreign assets in your base currency.
Online Shopping: Understand the actual cost of items priced in different currencies.
Important Note: Exchange rates fluctuate constantly. The rate you enter should be as current as possible for the most accurate conversion. This calculator uses the rate you provide and does not fetch live rates.
function calculateExchange() {
var amountInput = document.getElementById("amount");
var fromCurrency = document.getElementById("fromCurrency").value;
var toCurrency = document.getElementById("toCurrency").value;
var exchangeRateInput = document.getElementById("exchangeRate");
var resultValueDiv = document.getElementById("result-value");
var amount = parseFloat(amountInput.value);
var exchangeRate = parseFloat(exchangeRateInput.value);
if (isNaN(amount) || isNaN(exchangeRate)) {
resultValueDiv.innerHTML = "Invalid input. Please enter valid numbers.";
resultValueDiv.style.color = "#dc3545";
return;
}
if (amount < 0 || exchangeRate < 0) {
resultValueDiv.innerHTML = "Amount and rate cannot be negative.";
resultValueDiv.style.color = "#dc3545";
return;
}
var convertedAmount = amount * exchangeRate;
// Basic formatting for display, can be enhanced with Intl.NumberFormat for currency specifics
var formattedAmount = convertedAmount.toFixed(2);
resultValueDiv.innerHTML = formattedAmount + " " + toCurrency;
resultValueDiv.style.color = "#28a745";
}