Investment Rate of Return Calculator
Understanding the rate of return (RoR) is crucial for evaluating the profitability of an investment. It measures the gain or loss on an investment over a specific period, expressed as a percentage of the initial investment cost. A positive rate of return indicates profit, while a negative rate signifies a loss. This calculator helps you quickly determine the RoR for your investments.
function calculateRateOfReturn() {
var initialInvestment = parseFloat(document.getElementById("initialInvestment").value);
var finalValue = parseFloat(document.getElementById("finalValue").value);
var investmentPeriod = parseFloat(document.getElementById("investmentPeriod").value);
var resultElement = document.getElementById("result");
if (isNaN(initialInvestment) || isNaN(finalValue) || isNaN(investmentPeriod) || initialInvestment <= 0 || investmentPeriod <= 0) {
resultElement.innerHTML = "Please enter valid positive numbers for all fields.";
return;
}
var totalGain = finalValue – initialInvestment;
var rateOfReturn = (totalGain / initialInvestment) * 100;
var annualRateOfReturn = rateOfReturn / investmentPeriod;
resultElement.innerHTML =
"
Results:
" +
"Total Gain/Loss: " + totalGain.toFixed(2) + "" +
"Total Rate of Return: " + rateOfReturn.toFixed(2) + "%" +
"Average Annual Rate of Return: " + annualRateOfReturn.toFixed(2) + "%";
}
.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-title {
font-size: 24px;
font-weight: bold;
margin-bottom: 15px;
text-align: center;
color: #333;
}
.calculator-description {
font-size: 14px;
line-height: 1.6;
color: #555;
margin-bottom: 20px;
text-align: justify;
}
.calculator-inputs .input-group {
margin-bottom: 15px;
}
.calculator-inputs label {
display: block;
margin-bottom: 5px;
font-weight: bold;
color: #444;
}
.calculator-inputs input[type="number"] {
width: calc(100% – 22px);
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
}
.calculator-inputs button {
width: 100%;
padding: 12px 15px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
font-size: 16px;
cursor: pointer;
transition: background-color 0.3s ease;
}
.calculator-inputs button:hover {
background-color: #45a049;
}
.calculator-result {
margin-top: 25px;
padding: 15px;
border: 1px solid #eee;
border-radius: 4px;
background-color: #fff;
}
.calculator-result h3 {
margin-top: 0;
color: #333;
}
.calculator-result p {
margin-bottom: 8px;
color: #666;
font-size: 15px;
}