Exchange Rate Calculator
Understanding Exchange Rates
An exchange rate represents the value of one currency for the purpose of trading it for another. When you want to know how much of a second currency you get for a unit of a first currency, you are essentially calculating the exchange rate. This calculator helps you determine this relationship directly.
To calculate the exchange rate of the 'First Currency' to the 'Second Currency', you divide the 'Value in Second Currency' by the 'Value in First Currency'. This gives you the value of one unit of the first currency in terms of the second currency.
Formula:
Exchange Rate (1st Currency to 2nd Currency) = Value in Second Currency / Value in First Currency
For instance, if you have 100 units of Currency A and it's equivalent to 50 units of Currency B, the exchange rate of Currency A to Currency B is 50 / 100 = 0.5. This means 1 unit of Currency A is worth 0.5 units of Currency B.
Conversely, to find the exchange rate of the 'Second Currency' to the 'First Currency', you would divide the 'Value in First Currency' by the 'Value in Second Currency'.
Formula:
Exchange Rate (2nd Currency to 1st Currency) = Value in First Currency / Value in Second Currency
Using the same example: if 100 units of Currency A = 50 units of Currency B, the exchange rate of Currency B to Currency A is 100 / 50 = 2. This means 1 unit of Currency B is worth 2 units of Currency A.
function calculateExchangeRate() {
var value1 = parseFloat(document.getElementById("value1").value);
var value2 = parseFloat(document.getElementById("value2").value);
var resultDiv = document.getElementById("result");
if (isNaN(value1) || isNaN(value2)) {
resultDiv.innerHTML = "Please enter valid numbers for both values.";
return;
}
if (value1 === 0) {
resultDiv.innerHTML = "The value in the first currency cannot be zero for this calculation.";
return;
}
if (value2 === 0) {
resultDiv.innerHTML = "The value in the second currency cannot be zero for this calculation.";
return;
}
var rate1to2 = value2 / value1;
var rate2to1 = value1 / value2;
resultDiv.innerHTML =
"
Exchange Rate:" +
"1 unit of First Currency = " + rate1to2.toFixed(6) + " units of Second Currency" +
"1 unit of Second Currency = " + rate2to1.toFixed(6) + " units of First Currency";
}
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font-family: sans-serif;
max-width: 600px;
margin: 20px auto;
padding: 20px;
border: 1px solid #ccc;
border-radius: 8px;
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}
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}