Results
Your effective CD return rate will be displayed here.
.calculator-container {
font-family: sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
max-width: 600px;
margin: 20px auto;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.calculator-inputs h2, .calculator-results h3 {
text-align: center;
color: #333;
margin-bottom: 15px;
}
.calculator-inputs p {
text-align: center;
color: #555;
margin-bottom: 20px;
font-size: 0.9em;
}
.input-group {
margin-bottom: 15px;
display: flex;
align-items: center;
justify-content: space-between;
}
.input-group label {
margin-right: 10px;
color: #444;
flex-basis: 50%;
}
.input-group input {
padding: 8px;
border: 1px solid #ddd;
border-radius: 4px;
width: 50%;
}
button {
background-color: #4CAF50;
color: white;
padding: 10px 15px;
border: none;
border-radius: 4px;
cursor: pointer;
display: block;
width: 100%;
margin-top: 20px;
font-size: 1.1em;
}
button:hover {
background-color: #45a049;
}
#result {
margin-top: 20px;
padding: 10px;
background-color: #e9e9e9;
border-radius: 4px;
text-align: center;
font-size: 1.1em;
font-weight: bold;
color: #333;
}
function calculateCDReturnRate() {
var principal = parseFloat(document.getElementById("principalAmount").value);
var totalInterest = parseFloat(document.getElementById("totalInterestEarned").value);
var termMonths = parseFloat(document.getElementById("cdTermInMonths").value);
var fees = parseFloat(document.getElementById("fees").value);
var resultElement = document.getElementById("result");
if (isNaN(principal) || principal <= 0) {
resultElement.textContent = "Please enter a valid principal amount.";
return;
}
if (isNaN(totalInterest) || totalInterest < 0) {
resultElement.textContent = "Please enter a valid total interest earned.";
return;
}
if (isNaN(termMonths) || termMonths <= 0) {
resultElement.textContent = "Please enter a valid CD term in months.";
return;
}
if (isNaN(fees) || fees 0) {
var totalReturn = principal + netInterest;
// Formula for calculating APY (Annual Percentage Yield) when we know the final amount, initial principal, and term
// (Final Amount / Principal)^(1 / Number of Years) – 1
var numberOfYears = termMonths / 12;
effectiveAnnualRate = Math.pow((totalReturn / principal), (1 / numberOfYears)) – 1;
} else {
// If net interest is zero or negative, the return rate is 0 or negative.
// For simplicity and common interpretation, we'll show 0% if not profitable.
effectiveAnnualRate = 0;
}
var formattedRate = (effectiveAnnualRate * 100).toFixed(2);
resultElement.textContent = "Effective Annual Return Rate: " + formattedRate + "%";
}