function calculateROI() {
var initialInvestment = parseFloat(document.getElementById("initialInvestment").value);
var finalValue = parseFloat(document.getElementById("finalValue").value);
var investmentDuration = parseFloat(document.getElementById("investmentDuration").value);
var resultDiv = document.getElementById("result");
var roiPercentageP = document.getElementById("roiPercentage");
var annualizedROIP = document.getElementById("annualizedROI");
// Clear previous results
roiPercentageP.innerText = "";
annualizedROIP.innerText = "";
if (isNaN(initialInvestment) || isNaN(finalValue) || isNaN(investmentDuration)) {
resultDiv.style.color = "red";
resultDiv.innerText = "Please enter valid numbers for all fields.";
return;
}
if (initialInvestment <= 0) {
resultDiv.style.color = "red";
resultDiv.innerText = "Initial Investment Cost must be a positive number.";
return;
}
if (investmentDuration <= 0) {
resultDiv.style.color = "red";
resultDiv.innerText = "Investment Duration must be a positive number.";
return;
}
var profit = finalValue – initialInvestment;
var roi = (profit / initialInvestment) * 100;
var annualizedROI = roi / investmentDuration;
resultDiv.style.color = "black"; // Reset color to default
roiPercentageP.innerText = "Total Rate of Investment (ROI): " + roi.toFixed(2) + "%";
annualizedROIP.innerText = "Annualized Rate of Investment: " + annualizedROI.toFixed(2) + "% per year";
}
.calculator-wrapper {
font-family: Arial, sans-serif;
max-width: 600px;
margin: 20px auto;
padding: 20px;
border: 1px solid #ddd;
border-radius: 8px;
background-color: #f9f9f9;
}
.calculator-form h2 {
text-align: center;
color: #333;
margin-bottom: 20px;
}
.calculator-form p {
text-align: center;
color: #555;
margin-bottom: 30px;
line-height: 1.5;
}
.form-group {
margin-bottom: 20px;
display: flex;
flex-direction: column;
}
.form-group label {
margin-bottom: 8px;
font-weight: bold;
color: #444;
}
.form-group input[type="number"] {
padding: 12px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1rem;
box-sizing: border-box; /* Ensure padding doesn't affect width */
}
.calculator-form button {
display: block;
width: 100%;
padding: 12px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.3s ease;
}
.calculator-form button:hover {
background-color: #0056b3;
}
.calculator-result {
margin-top: 30px;
padding: 20px;
border: 1px solid #e0e0e0;
border-radius: 8px;
background-color: #fff;
text-align: center;
}
.calculator-result h3 {
margin-top: 0;
color: #333;
margin-bottom: 15px;
}
.calculator-result p {
font-size: 1.1rem;
color: #333;
margin-bottom: 10px;
}