.mortgage-calculator-wrapper {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
max-width: 800px;
margin: 0 auto;
background: #ffffff;
border: 1px solid #e0e0e0;
border-radius: 8px;
padding: 20px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.calc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 768px) {
.calc-grid {
grid-template-columns: 1fr;
}
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 5px;
font-weight: 600;
color: #333;
}
.input-group input, .input-group select {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
}
.calc-btn {
background-color: #0073aa;
color: white;
border: none;
padding: 12px 20px;
font-size: 16px;
border-radius: 4px;
cursor: pointer;
width: 100%;
font-weight: bold;
transition: background 0.3s;
margin-top: 10px;
}
.calc-btn:hover {
background-color: #005177;
}
.results-box {
background-color: #f9f9f9;
padding: 20px;
border-radius: 6px;
margin-top: 20px;
border-left: 5px solid #0073aa;
}
.result-row {
display: flex;
justify-content: space-between;
margin-bottom: 10px;
padding-bottom: 10px;
border-bottom: 1px solid #eee;
}
.result-row:last-child {
border-bottom: none;
margin-bottom: 0;
padding-bottom: 0;
}
.result-label {
color: #555;
font-weight: 500;
}
.result-value {
font-weight: 700;
color: #222;
font-size: 18px;
}
.highlight-value {
color: #0073aa;
font-size: 24px;
}
.seo-content {
margin-top: 40px;
line-height: 1.6;
color: #444;
}
.seo-content h2 {
color: #2c3e50;
margin-top: 30px;
font-size: 24px;
}
.seo-content p {
margin-bottom: 15px;
}
.seo-content ul {
margin-bottom: 15px;
padding-left: 20px;
}
.error-msg {
color: #d32f2f;
font-size: 14px;
margin-top: 5px;
display: none;
}
function calculateMortgage() {
var homePriceInput = document.getElementById("homePrice");
var downPaymentInput = document.getElementById("downPayment");
var interestRateInput = document.getElementById("interestRate");
var loanTermInput = document.getElementById("loanTerm");
var price = parseFloat(homePriceInput.value);
var down = parseFloat(downPaymentInput.value);
var rate = parseFloat(interestRateInput.value);
var years = parseInt(loanTermInput.value);
var errorDiv = document.getElementById("error-display");
var resultsDiv = document.getElementById("resultsSection");
var initialDiv = document.getElementById("initial-state");
// Validation
if (isNaN(price) || isNaN(down) || isNaN(rate) || price <= 0 || down < 0 || rate = price
if (principal <= 0) {
document.getElementById("monthlyPaymentResult").innerHTML = "$0.00";
document.getElementById("principalResult").innerHTML = "$0.00";
document.getElementById("interestResult").innerHTML = "$0.00";
document.getElementById("totalCostResult").innerHTML = "$0.00";
resultsDiv.style.display = "block";
initialDiv.style.display = "none";
return;
}
var monthlyRate = rate / 100 / 12;
var numberOfPayments = years * 12;
var monthlyPayment = 0;
if (rate === 0) {
monthlyPayment = principal / numberOfPayments;
} else {
// Formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1]
monthlyPayment = principal * (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1);
}
var totalCost = monthlyPayment * numberOfPayments;
var totalInterest = totalCost – principal;
// Display Results
// Helper function for currency formatting
var formatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
});
document.getElementById("monthlyPaymentResult").innerHTML = formatter.format(monthlyPayment);
document.getElementById("principalResult").innerHTML = formatter.format(principal);
document.getElementById("interestResult").innerHTML = formatter.format(totalInterest);
document.getElementById("totalCostResult").innerHTML = formatter.format(totalCost);
resultsDiv.style.display = "block";
initialDiv.style.display = "none";
}
Mortgage Repayment Calculator
30 Years
25 Years
20 Years
15 Years
10 Years
Please enter valid positive numbers.
Monthly Payment:
–
Total Principal:
–
Total Interest:
–
Total Cost of Loan:
–
Enter your details to see the breakdown.
Understanding Your Mortgage Repayments
Purchasing a home is one of the most significant financial decisions you will make. Using a Mortgage Repayment Calculator helps you understand the long-term financial commitment involved in taking out a home loan. By inputting your home price, down payment, interest rate, and loan term, you can estimate your monthly obligations and plan your budget effectively.
How Mortgage Amortization Works
Your monthly mortgage payment is typically divided into two parts: principal and interest. In the early years of a long-term mortgage (like a 30-year fixed loan), a large portion of your payment goes toward interest. As time passes, the balance shifts, and more of your payment is applied to the principal balance. This process is known as amortization.
Key Factors Affecting Your Loan
- Loan Principal: This is the amount you borrow, calculated as the home price minus your down payment. A larger down payment reduces your principal and monthly payments.
- Interest Rate: Even a small difference in percentage can result in tens of thousands of dollars in savings or extra costs over the life of a loan.
- Loan Term: Shorter terms (e.g., 15 years) usually have higher monthly payments but significantly lower total interest costs compared to 30-year terms.
Why Calculate Before You Apply?
Lenders look at your Debt-to-Income (DTI) ratio to determine eligibility. knowing your estimated monthly payment helps you assess whether a specific property fits within your financial comfort zone before you start the application process. Remember to also account for property taxes, homeowner's insurance, and private mortgage insurance (PMI) if your down payment is less than 20%.