USD – US Dollar
EUR – Euro
GBP – British Pound
JPY – Japanese Yen
CAD – Canadian Dollar
AUD – Australian Dollar
CHF – Swiss Franc
CNY – Chinese Yuan
INR – Indian Rupee
EUR – Euro
USD – US Dollar
GBP – British Pound
JPY – Japanese Yen
CAD – Canadian Dollar
AUD – Australian Dollar
CHF – Swiss Franc
CNY – Chinese Yuan
INR – Indian Rupee
Leave blank to use standard market estimates.
Converted Amount:—
Exchange Rate Used:—
Inverse Rate:—
function calculateCurrency() {
// 1. Get input values
var amountInput = document.getElementById("amount").value;
var fromCurr = document.getElementById("fromCurrency").value;
var toCurr = document.getElementById("toCurrency").value;
var customRateInput = document.getElementById("customRate").value;
// 2. Validate Amount
var amount = parseFloat(amountInput);
if (isNaN(amount) || amount 0) {
// User provided a manual rate
exchangeRate = parseFloat(customRateInput);
isCustom = true;
} else {
// Calculate via USD base
var fromRate = rates[fromCurr];
var toRate = rates[toCurr];
// Formula: TargetAmount = SourceAmount * (ToRate / FromRate)
// Example: 100 EUR to JPY.
// 100 EUR / 0.92 = 108.69 USD
// 108.69 USD * 150.5 = 16,358 JPY
exchangeRate = toRate / fromRate;
}
var resultValue = amount * exchangeRate;
var inverseValue = 1 / exchangeRate;
// 5. Formatting Helper
function formatMoney(val, currency) {
// Currencies with no decimals typically
if (currency === "JPY") {
return val.toLocaleString('en-US', { style: 'currency', currency: currency, maximumFractionDigits: 0 });
}
return val.toLocaleString('en-US', { style: 'currency', currency: currency });
}
// 6. Display Results
var displayResult = document.getElementById("finalResult");
var displayRate = document.getElementById("rateUsed");
var displayInverse = document.getElementById("inverseRate");
var resultContainer = document.getElementById("resultContainer");
displayResult.innerHTML = formatMoney(resultValue, toCurr);
if (isCustom) {
displayRate.innerHTML = "1 " + fromCurr + " = " + exchangeRate.toFixed(4) + " " + toCurr + " (Custom)";
} else {
displayRate.innerHTML = "1 " + fromCurr + " = " + exchangeRate.toFixed(4) + " " + toCurr;
}
displayInverse.innerHTML = "1 " + toCurr + " = " + inverseValue.toFixed(4) + " " + fromCurr;
resultContainer.style.display = "block";
}
Understanding Currency Exchange Rates
The global foreign exchange (Forex) market determines the relative values of different currencies. Whether you are a traveler planning a trip, a business owner paying international invoices, or an investor, understanding how to read and calculate currency exchange rates is essential. This Current Currency Exchange Rate Calculator allows you to estimate conversions between major global currencies based on standard market data or your own custom bank rates.
How Exchange Rates Work
An exchange rate represents the value of one currency in terms of another. It is essentially the price you pay to "buy" foreign money.
Base Currency: The first currency listed in a pair (e.g., USD in USD/EUR).
Quote Currency: The second currency listed (e.g., EUR in USD/EUR).
If the exchange rate for USD/EUR is 0.92, it means 1 US Dollar can purchase 0.92 Euros. Conversely, to buy 1 US Dollar, you would need approximately 1.09 Euros (1 / 0.92).
Factors Influencing Currency Rates
Factor
Impact on Currency Value
Interest Rates
Higher central bank interest rates typically attract foreign capital, increasing demand and the value of the currency.
Inflation
Lower inflation rates generally lead to currency appreciation, as purchasing power is maintained.
Economic Stability
Strong economic performance and political stability attract investors, boosting the currency's strength.
Trade Balance
A country with a trade surplus (exports > imports) often sees its currency appreciate due to foreign demand for its goods.
Interbank Rates vs. Retail Rates
It is important to note the difference between the "mid-market" (or interbank) rate and the "retail" rate.
Mid-Market Rate: This is the "real" exchange rate banks use to trade with each other. It is the midpoint between buy and sell prices.
Retail Rate: This is the rate consumers receive from banks, airports, or currency exchange kiosks. It usually includes a "spread" or markup (often 2% to 5%) to cover costs and profit.
When using this calculator, you can enter the specific rate provided by your bank in the "Custom Exchange Rate" field to get the most accurate calculation for your specific transaction costs.
Frequently Asked Questions (FAQ)
Why do exchange rates change constantly?
Currency is traded 24 hours a day during the workweek. Prices fluctuate second-by-second based on supply and demand, geopolitical news, economic data releases, and market sentiment.
How do I calculate the inverse rate?
To find the inverse rate (how much of the base currency equals 1 unit of the quote currency), simply divide 1 by the exchange rate. For example, if 1 USD = 1.36 CAD, then 1 CAD = 1 / 1.36 = 0.735 USD.
Does this calculator include transaction fees?
No, the standard calculation uses pure ratio logic. If your bank charges a flat fee (e.g., $10 per transfer) or a percentage fee, you should deduct that from your starting amount or adjust the "Custom Rate" to reflect the effective cost.