Investment ROI Calculator
This calculator helps you estimate the Return on Investment (ROI) for your investments. ROI is a performance measure used to evaluate the efficiency of an investment or compare the efficiency of a number of different investments.
Initial Investment:
Current Value:
Additional Investment (Optional):
Withdrawals (Optional):
Calculate ROI
function calculateROI() {
var initialInvestment = parseFloat(document.getElementById("initialInvestment").value);
var currentValue = parseFloat(document.getElementById("currentValue").value);
var additionalInvestment = parseFloat(document.getElementById("additionalInvestment").value);
var withdrawals = parseFloat(document.getElementById("withdrawals").value);
var resultDiv = document.getElementById("roi-result");
var roiPercentageEl = document.getElementById("roi-percentage");
var totalGainEl = document.getElementById("totalGain");
// Validate inputs
if (isNaN(initialInvestment) || isNaN(currentValue) || isNaN(additionalInvestment) || isNaN(withdrawals) || initialInvestment <= 0) {
resultDiv.style.display = "block";
roiPercentageEl.textContent = "Please enter valid numbers for all fields. Initial investment must be greater than zero.";
totalGainEl.textContent = "";
return;
}
// Calculate Net Profit
var netProfit = currentValue – initialInvestment – additionalInvestment + withdrawals;
// Calculate Total Investment Cost
var totalInvestmentCost = initialInvestment + additionalInvestment;
// Calculate ROI Percentage
var roiPercentage = (netProfit / totalInvestmentCost) * 100;
// Display results
resultDiv.style.display = "block";
roiPercentageEl.textContent = "ROI: " + roiPercentage.toFixed(2) + "%";
totalGainEl.textContent = "Total Gain/Loss: $" + netProfit.toFixed(2);
}
#roi-calculator {
font-family: sans-serif;
max-width: 500px;
margin: 20px auto;
padding: 20px;
border: 1px solid #ddd;
border-radius: 8px;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
#roi-calculator h2, #roi-calculator h3 {
text-align: center;
color: #333;
}
.input-row {
margin-bottom: 15px;
display: flex;
align-items: center;
}
.input-row label {
flex: 1;
margin-right: 10px;
font-weight: bold;
color: #555;
}
.input-row input[type="number"] {
flex: 2;
padding: 8px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1em;
}
button {
display: block;
width: 100%;
padding: 10px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
font-size: 1.1em;
cursor: pointer;
transition: background-color 0.3s ease;
}
button:hover {
background-color: #45a049;
}
#roi-result {
margin-top: 20px;
padding: 15px;
background-color: #f9f9f9;
border: 1px solid #eee;
border-radius: 4px;
display: none; /* Hidden by default */
}
#roi-result p {
margin: 5px 0;
font-size: 1.1em;
}
#roi-percentage {
font-weight: bold;
color: #27ae60;
}
#totalGain {
font-weight: bold;
color: #c0392b;
}