.calculator-wrapper-seo {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
background: #f9f9f9;
border: 1px solid #e0e0e0;
border-radius: 8px;
}
.calc-container {
background: #ffffff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
margin-bottom: 40px;
}
.calc-title {
text-align: center;
color: #2c3e50;
margin-bottom: 25px;
font-size: 28px;
font-weight: 700;
}
.input-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
margin-bottom: 25px;
}
@media (max-width: 600px) {
.input-grid {
grid-template-columns: 1fr;
}
}
.input-group {
display: flex;
flex-direction: column;
}
.input-group label {
font-size: 14px;
font-weight: 600;
color: #555;
margin-bottom: 8px;
}
.input-group input, .input-group select {
padding: 12px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
transition: border-color 0.3s;
}
.input-group input:focus {
border-color: #3498db;
outline: none;
}
.calc-btn {
width: 100%;
padding: 15px;
background-color: #2980b9;
color: white;
border: none;
border-radius: 4px;
font-size: 18px;
font-weight: 600;
cursor: pointer;
transition: background-color 0.3s;
}
.calc-btn:hover {
background-color: #1f6391;
}
.results-box {
margin-top: 30px;
padding: 20px;
background-color: #f0f7fb;
border-left: 5px solid #2980b9;
border-radius: 4px;
display: none;
}
.result-row {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 10px;
padding-bottom: 10px;
border-bottom: 1px solid #dcebf5;
}
.result-row:last-child {
border-bottom: none;
margin-bottom: 0;
padding-bottom: 0;
}
.result-label {
color: #555;
font-size: 16px;
}
.result-value {
font-size: 20px;
font-weight: 700;
color: #2c3e50;
}
.big-result {
font-size: 32px;
color: #27ae60;
}
.content-section {
line-height: 1.6;
color: #333;
}
.content-section h2 {
color: #2c3e50;
margin-top: 30px;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
}
.content-section h3 {
color: #34495e;
margin-top: 20px;
}
.content-section ul {
padding-left: 20px;
}
.content-section li {
margin-bottom: 10px;
}
function calculateMortgage() {
// Get input values
var priceInput = document.getElementById("homePrice").value;
var downPaymentInput = document.getElementById("downPayment").value;
var rateInput = document.getElementById("interestRate").value;
var termInput = document.getElementById("loanTerm").value;
// Convert to numbers
var price = parseFloat(priceInput);
var downPayment = parseFloat(downPaymentInput);
var annualRate = parseFloat(rateInput);
var years = parseInt(termInput);
// Validation
if (isNaN(price) || isNaN(downPayment) || isNaN(annualRate) || isNaN(years) || price <= 0) {
alert("Please enter valid positive numbers for all fields.");
return;
}
// Logic Variables
var principal = price – downPayment;
// Handle edge case where down payment is greater than price
if (principal < 0) {
principal = 0;
}
var monthlyRate = (annualRate / 100) / 12;
var numberOfPayments = years * 12;
var monthlyPayment = 0;
// Calculation
if (annualRate === 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;
// Formatting Output
var formatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
minimumFractionDigits: 2
});
// Display Results
document.getElementById("monthlyPaymentDisplay").innerHTML = formatter.format(monthlyPayment);
document.getElementById("loanAmountDisplay").innerHTML = formatter.format(principal);
document.getElementById("totalInterestDisplay").innerHTML = formatter.format(totalInterest);
document.getElementById("totalCostDisplay").innerHTML = formatter.format(totalCost);
// Show results container
document.getElementById("results").style.display = "block";
}
Mortgage Payment Calculator
30 Years
20 Years
15 Years
10 Years
Estimated Monthly Payment:
$0.00
Principal Loan Amount:
$0.00
Total Interest Paid:
$0.00
Total Cost of Loan:
$0.00
Understanding Your Mortgage Calculation
Purchasing a home is one of the most significant financial decisions you will make in your lifetime. Our Mortgage Payment Calculator is designed to provide clarity on your potential financial commitments by breaking down the costs associated with a home loan.
How the Mortgage Formula Works
This calculator uses the standard amortization formula to determine your monthly principal and interest payments. The calculation takes into account four primary factors:
- Home Price: The total sale price of the property you intend to purchase.
- Down Payment: The upfront cash amount you pay towards the home. A higher down payment reduces your loan principal and often secures a better interest rate.
- Interest Rate: The annual percentage rate charged by the lender. Even a small fraction of a percentage difference can impact your monthly payment significantly over 30 years.
- Loan Term: The duration over which you will repay the loan. Standard terms are 15 or 30 years. Shorter terms have higher monthly payments but result in less total interest paid.
Principal vs. Interest
In the early years of a fixed-rate mortgage, the majority of your monthly payment goes toward paying off interest. As time progresses, a larger portion of your payment is applied to the principal balance. This calculator provides the Total Interest Paid figure, which highlights the cost of borrowing money over the life of the loan.
Why Calculate Before You Apply?
Using a mortgage calculator helps you define your budget before approaching lenders. By adjusting the "Home Price" and "Down Payment" fields, you can find a monthly payment comfort zone that aligns with your income and expenses, ensuring you don't overextend your finances.