Rate of Return Calculator
The Rate of Return (RoR) is a performance measure used to evaluate the efficiency of an investment or compare the efficiency of a number of different investments. It quantizes the gain or loss on an investment over a specified period of time, expressed as a percentage of the initial investment cost. A higher rate of return indicates a more profitable investment.
The basic formula for Rate of Return is:
RoR = ((Current Value – Initial Investment) / Initial Investment) * 100
function calculateRateOfReturn() {
var initialInvestment = parseFloat(document.getElementById("initialInvestment").value);
var currentValue = parseFloat(document.getElementById("currentValue").value);
var resultDiv = document.getElementById("result");
if (isNaN(initialInvestment) || isNaN(currentValue)) {
resultDiv.innerHTML = "Please enter valid numbers for both Initial Investment and Current Value.";
return;
}
if (initialInvestment === 0) {
resultDiv.innerHTML = "Initial Investment cannot be zero.";
return;
}
var rateOfReturn = ((currentValue – initialInvestment) / initialInvestment) * 100;
resultDiv.innerHTML = "
Result:
" +
"Initial Investment: " + initialInvestment.toFixed(2) + "" +
"Current Value: " + currentValue.toFixed(2) + "" +
"
Rate of Return: " + rateOfReturn.toFixed(2) + "%";
}
#rate-of-return-calculator {
font-family: sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
max-width: 400px;
margin: 20px auto;
background-color: #f9f9f9;
}
.calculator-inputs {
margin-top: 15px;
}
.input-group {
margin-bottom: 10px;
}
.input-group label {
display: block;
margin-bottom: 5px;
font-weight: bold;
}
.input-group input {
width: calc(100% – 12px);
padding: 8px;
border: 1px solid #ccc;
border-radius: 4px;
box-sizing: border-box;
}
#rate-of-return-calculator button {
background-color: #4CAF50;
color: white;
padding: 10px 15px;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
margin-top: 10px;
}
#rate-of-return-calculator button:hover {
background-color: #45a049;
}
.calculator-result {
margin-top: 20px;
padding: 15px;
border: 1px solid #ddd;
background-color: #fff;
border-radius: 4px;
}
.calculator-result h3 {
margin-top: 0;
color: #333;
}
.calculator-result p {
margin-bottom: 5px;
}
.calculator-result strong {
color: #4CAF50;
}