Annual Return Rate Calculator
Understanding your annual return rate is crucial for evaluating the performance of any investment. This calculator helps you quickly determine how much your investment has grown or shrunk over a year in percentage terms.
function calculateAnnualReturnRate() {
var initialInvestment = parseFloat(document.getElementById("initialInvestment").value);
var finalInvestment = parseFloat(document.getElementById("finalInvestment").value);
var timePeriod = parseFloat(document.getElementById("timePeriod").value);
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
if (isNaN(initialInvestment) || isNaN(finalInvestment) || isNaN(timePeriod)) {
resultDiv.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (initialInvestment <= 0) {
resultDiv.innerHTML = "Initial investment must be greater than zero.";
return;
}
if (timePeriod <= 0) {
resultDiv.innerHTML = "Time period must be greater than zero.";
return;
}
// Calculate the total gain or loss
var totalGainOrLoss = finalInvestment – initialInvestment;
// Calculate the total return percentage
var totalReturnPercentage = (totalGainOrLoss / initialInvestment) * 100;
// Calculate the annual return rate
var annualReturnRate = (Math.pow((finalInvestment / initialInvestment), (1 / timePeriod)) – 1) * 100;
var resultHTML = "
Results:
";
resultHTML += "Total Gain/Loss: ";
if (totalGainOrLoss >= 0) {
resultHTML += "
+" + totalGainOrLoss.toFixed(2) + "";
} else {
resultHTML += "
" + totalGainOrLoss.toFixed(2) + "";
}
resultHTML += "";
resultHTML += "Total Return Percentage: ";
if (totalReturnPercentage >= 0) {
resultHTML += "
+" + totalReturnPercentage.toFixed(2) + "%";
} else {
resultHTML += "
" + totalReturnPercentage.toFixed(2) + "%";
}
resultHTML += "";
resultHTML += "
Annual Return Rate: ";
if (annualReturnRate >= 0) {
resultHTML += "
" + annualReturnRate.toFixed(2) + "%";
} else {
resultHTML += "
" + annualReturnRate.toFixed(2) + "%";
}
resultHTML += "";
resultDiv.innerHTML = resultHTML;
}
.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;
}
.calculator-inputs .form-group {
margin-bottom: 15px;
}
.calculator-inputs label {
display: block;
margin-bottom: 5px;
font-weight: bold;
color: #555;
}
.calculator-inputs input[type="number"] {
width: calc(100% – 22px);
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
}
.calculator-inputs button {
width: 100%;
padding: 12px 20px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
font-size: 16px;
cursor: pointer;
transition: background-color 0.3s ease;
}
.calculator-inputs button:hover {
background-color: #0056b3;
}
.calculator-result {
margin-top: 25px;
padding: 15px;
border: 1px solid #ddd;
border-radius: 4px;
background-color: #fff;
}
.calculator-result h3 {
margin-top: 0;
color: #333;
}
.calculator-result p {
margin-bottom: 10px;
font-size: 16px;
}
.positive {
color: #28a745; /* Green */
}
.negative {
color: #dc3545; /* Red */
}
.error {
color: #dc3545;
font-weight: bold;
}