.calculator-container-unique {
font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
color: #333;
line-height: 1.6;
}
.roi-calc-box {
background: #ffffff;
border: 1px solid #e0e0e0;
border-radius: 8px;
padding: 30px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
margin-bottom: 40px;
}
.roi-header {
text-align: center;
margin-bottom: 25px;
color: #2c3e50;
}
.roi-form-group {
margin-bottom: 20px;
}
.roi-label {
display: block;
font-weight: 600;
margin-bottom: 8px;
color: #444;
}
.roi-input {
width: 100%;
padding: 12px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.3s;
}
.roi-input:focus {
border-color: #3498db;
outline: none;
}
.roi-btn {
width: 100%;
padding: 15px;
background-color: #27ae60;
color: white;
border: none;
border-radius: 4px;
font-size: 18px;
font-weight: bold;
cursor: pointer;
transition: background-color 0.3s;
}
.roi-btn:hover {
background-color: #219150;
}
.roi-results {
margin-top: 25px;
background-color: #f8f9fa;
border-left: 5px solid #27ae60;
padding: 20px;
display: none;
}
.roi-result-row {
display: flex;
justify-content: space-between;
margin-bottom: 10px;
padding-bottom: 10px;
border-bottom: 1px solid #eee;
}
.roi-result-row:last-child {
border-bottom: none;
margin-bottom: 0;
padding-bottom: 0;
}
.roi-result-label {
font-weight: 600;
color: #555;
}
.roi-result-value {
font-weight: 700;
color: #2c3e50;
font-size: 18px;
}
.roi-result-value.positive {
color: #27ae60;
}
.roi-result-value.negative {
color: #c0392b;
}
.article-content h2 {
color: #2c3e50;
margin-top: 30px;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
}
.article-content ul {
padding-left: 20px;
}
.article-content li {
margin-bottom: 10px;
}
@media (max-width: 600px) {
.roi-calc-box {
padding: 20px;
}
}
function calculateROI() {
var investedInput = document.getElementById("amountInvested").value;
var returnedInput = document.getElementById("amountReturned").value;
var yearsInput = document.getElementById("investTime").value;
var invested = parseFloat(investedInput);
var returned = parseFloat(returnedInput);
var years = parseFloat(yearsInput);
var resultsDiv = document.getElementById("resultsArea");
var resGain = document.getElementById("resGain");
var resTotalRoi = document.getElementById("resTotalRoi");
var resAnnualized = document.getElementById("resAnnualized");
var annualizedRow = document.getElementById("annualizedRow");
// Input Validation
if (isNaN(invested) || isNaN(returned)) {
alert("Please enter valid numbers for Amount Invested and Amount Returned.");
resultsDiv.style.display = "none";
return;
}
if (invested = 0) {
resGain.className = "roi-result-value positive";
resTotalRoi.className = "roi-result-value positive";
} else {
resGain.className = "roi-result-value negative";
resTotalRoi.className = "roi-result-value negative";
}
// Total ROI Result
resTotalRoi.innerHTML = roiPercent.toFixed(2) + "%";
// Annualized ROI Calculation
if (!isNaN(years) && years > 0) {
// Formula: ((Final Value / Initial Value) ^ (1 / Years)) – 1
var annualizedVal = (Math.pow((returned / invested), (1 / years)) – 1) * 100;
resAnnualized.innerHTML = annualizedVal.toFixed(2) + "%";
if (annualizedVal >= 0) {
resAnnualized.className = "roi-result-value positive";
} else {
resAnnualized.className = "roi-result-value negative";
}
annualizedRow.style.display = "flex";
} else {
annualizedRow.style.display = "none";
}
// Show Results
resultsDiv.style.display = "block";
}
What is Return on Investment (ROI)?
Return on Investment (ROI) is a performance measure used to evaluate the efficiency or profitability of an investment or compare the efficiency of a number of different investments. ROI tries to directly measure the amount of return on a particular investment, relative to the investment's cost.
Whether you are investing in stocks, real estate, or starting a small business, calculating your ROI is essential to understanding if your money is working effectively for you.
How to Calculate ROI
The standard formula for calculating Return on Investment is relatively simple:
ROI = (Net Profit / Cost of Investment) x 100
Where Net Profit is the total amount returned minus the initial amount invested.
Example Calculation
Let's say you invest $10,000 in the stock market (Cost of Investment). After two years, you sell your shares for $12,500 (Amount Returned).
- Step 1: Calculate Net Profit: $12,500 – $10,000 = $2,500.
- Step 2: Divide by Cost: $2,500 / $10,000 = 0.25.
- Step 3: Convert to Percentage: 0.25 x 100 = 25% ROI.
Understanding Annualized ROI
While total ROI tells you how much you made overall, it doesn't account for time. A 20% return over 1 year is fantastic, but a 20% return over 10 years is poor. This is why our calculator includes an Annualized ROI feature.
Annualized ROI provides the geometric average amount of money earned by an investment each year over a given time period. It is the best way to compare investments that have been held for different lengths of time.
What is a Good ROI?
A "good" ROI depends heavily on the risk profile of the investment and the time horizon:
- Stock Market: historically averages about 7-10% annually (inflation-adjusted).
- Real Estate: often targets 8-12% annually, though cash flow and appreciation vary.
- Small Business: often requires a higher ROI (20%+) to justify the high risk and effort involved.
Use the calculator above to check your current investments and ensure they align with your financial goals.