.calculator-wrapper {
font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
border: 1px solid #e0e0e0;
border-radius: 8px;
background: #fff;
padding: 20px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.calc-header {
text-align: center;
margin-bottom: 30px;
}
.calc-header h2 {
margin: 0;
color: #2c3e50;
}
.calc-container {
display: flex;
flex-wrap: wrap;
gap: 20px;
}
.calc-inputs {
flex: 1;
min-width: 300px;
}
.calc-results {
flex: 1;
min-width: 300px;
background: #f8f9fa;
padding: 20px;
border-radius: 8px;
display: flex;
flex-direction: column;
justify-content: center;
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 5px;
font-weight: 600;
color: #555;
font-size: 0.9rem;
}
.input-group input, .input-group select {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 1rem;
box-sizing: border-box;
}
.input-group input:focus {
border-color: #3498db;
outline: none;
}
.calc-btn {
width: 100%;
padding: 12px;
background-color: #2980b9;
color: white;
border: none;
border-radius: 4px;
font-size: 1rem;
font-weight: bold;
cursor: pointer;
transition: background-color 0.2s;
margin-top: 10px;
}
.calc-btn:hover {
background-color: #1c6ea4;
}
.result-row {
display: flex;
justify-content: space-between;
margin-bottom: 15px;
padding-bottom: 10px;
border-bottom: 1px solid #e0e0e0;
}
.result-row:last-child {
border-bottom: none;
margin-bottom: 0;
padding-bottom: 0;
}
.result-label {
color: #666;
}
.result-value {
font-weight: bold;
color: #2c3e50;
}
.total-payment {
margin-top: 10px;
padding-top: 15px;
border-top: 2px solid #2980b9;
}
.total-payment .result-value {
font-size: 1.5rem;
color: #2980b9;
}
.seo-content {
margin-top: 40px;
line-height: 1.6;
color: #444;
}
.seo-content h2 {
color: #2c3e50;
margin-top: 30px;
}
.seo-content h3 {
color: #34495e;
margin-top: 20px;
}
.seo-content ul {
padding-left: 20px;
}
function calculateMortgage() {
// Get Input Values
var homePrice = parseFloat(document.getElementById('mc-home-price').value);
var downPayment = parseFloat(document.getElementById('mc-down-payment').value);
var interestRate = parseFloat(document.getElementById('mc-interest-rate').value);
var loanTerm = parseInt(document.getElementById('mc-loan-term').value);
var propertyTax = parseFloat(document.getElementById('mc-property-tax').value);
var insurance = parseFloat(document.getElementById('mc-insurance').value);
// Validation
if (isNaN(homePrice) || isNaN(downPayment) || isNaN(interestRate) || isNaN(loanTerm)) {
alert("Please enter valid numbers for all fields.");
return;
}
if (downPayment >= homePrice) {
alert("Down payment cannot be greater than or equal to the home price.");
return;
}
// Calculation Logic
var principal = homePrice – downPayment;
var monthlyRate = (interestRate / 100) / 12;
var numberOfPayments = loanTerm * 12;
// Mortgage Formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
var monthlyPI = 0;
if (interestRate === 0) {
monthlyPI = principal / numberOfPayments;
} else {
monthlyPI = principal * (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1);
}
// Tax and Insurance Calculations
var monthlyTax = 0;
var monthlyInsurance = 0;
if (!isNaN(propertyTax)) {
monthlyTax = propertyTax / 12;
}
if (!isNaN(insurance)) {
monthlyInsurance = insurance / 12;
}
var totalMonthlyPayment = monthlyPI + monthlyTax + monthlyInsurance;
// Update DOM with formatted currency
document.getElementById('res-pi').innerHTML = formatCurrency(monthlyPI);
document.getElementById('res-tax').innerHTML = formatCurrency(monthlyTax);
document.getElementById('res-ins').innerHTML = formatCurrency(monthlyInsurance);
document.getElementById('res-total').innerHTML = formatCurrency(totalMonthlyPayment);
}
function formatCurrency(num) {
return '$' + num.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,');
}
// Initialize with default values
window.onload = function() {
calculateMortgage();
};
Mortgage Payment Calculator
Estimate your monthly payments including taxes and insurance
30 Years
20 Years
15 Years
10 Years
Principal & Interest:
$0.00
Monthly Property Tax:
$0.00
Monthly Insurance:
$0.00
Total Monthly Payment:
$0.00
*PMI not included in this estimate.
Understanding Your Mortgage Calculation
When planning to purchase a home, understanding your monthly financial obligation is crucial. This Mortgage Payment Calculator helps you estimate not just the loan repayment, but the "hidden" costs of homeownership like property taxes and insurance.
The Components of Your Monthly Payment
Your monthly mortgage payment is typically comprised of four main parts, often referred to as PITI:
- Principal: The portion of your payment that reduces the loan balance.
- Interest: The cost of borrowing money, paid to the lender.
- Taxes: Property taxes assessed by your local government, usually held in escrow.
- Insurance: Homeowners insurance to protect your property against damage.
How Down Payment Affects Your Loan
The size of your down payment directly impacts your monthly principal and interest. A larger down payment reduces the loan amount, which lowers your monthly obligation and may also secure you a lower interest rate. If you put down less than 20%, you may also be required to pay Private Mortgage Insurance (PMI), which is an additional cost not calculated above.
Interest Rates and Loan Terms
Even a small difference in interest rates can significantly affect your total payment over the life of a 30-year loan. Shorter loan terms, such as 15 years, typically come with lower interest rates but higher monthly payments because the principal is repaid much faster.