Mortgage Payment Calculator
Understanding your monthly mortgage payment is crucial when buying a home. This calculator helps you estimate your principal and interest payment based on the loan amount, interest rate, and loan term.
Estimated Monthly Payment:
$0.00
.calculator-container {
font-family: sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
max-width: 500px;
margin: 20px auto;
background-color: #f9f9f9;
}
.calculator-inputs {
margin-bottom: 20px;
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 5px;
font-weight: bold;
}
.input-group input {
width: calc(100% – 12px);
padding: 8px;
border: 1px solid #ccc;
border-radius: 4px;
}
button {
background-color: #4CAF50;
color: white;
padding: 10px 15px;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
}
button:hover {
background-color: #45a049;
}
.calculator-result {
text-align: center;
margin-top: 20px;
padding: 15px;
border-top: 1px solid #eee;
}
.calculator-result h3 {
margin-bottom: 10px;
color: #333;
}
.calculator-result p {
font-size: 24px;
font-weight: bold;
color: #d9534f;
}
function calculateMortgage() {
var loanAmount = parseFloat(document.getElementById("loanAmount").value);
var annualInterestRate = parseFloat(document.getElementById("annualInterestRate").value);
var loanTermYears = parseInt(document.getElementById("loanTermYears").value);
if (isNaN(loanAmount) || isNaN(annualInterestRate) || isNaN(loanTermYears) ||
loanAmount <= 0 || annualInterestRate < 0 || loanTermYears 0) {
monthlyPayment = loanAmount * (monthlyInterestRate * Math.pow(1 + monthlyInterestRate, numberOfPayments)) / (Math.pow(1 + monthlyInterestRate, numberOfPayments) – 1);
} else {
// If interest rate is 0, payment is just principal divided by number of payments
monthlyPayment = loanAmount / numberOfPayments;
}
document.getElementById("monthlyPayment").innerText = "$" + monthlyPayment.toFixed(2);
}