.mortgage-calculator-widget {
font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
color: #333;
line-height: 1.6;
}
.calc-container {
background: #f9f9f9;
border: 1px solid #e0e0e0;
border-radius: 8px;
padding: 30px;
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: 24px;
font-weight: 700;
}
.calc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 600px) {
.calc-grid {
grid-template-columns: 1fr;
}
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
font-size: 14px;
color: #555;
}
.input-wrapper {
position: relative;
}
.input-wrapper input {
width: 100%;
padding: 12px 12px 12px 35px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.3s;
}
.input-wrapper input:focus {
border-color: #3498db;
outline: none;
}
.input-symbol {
position: absolute;
left: 12px;
top: 50%;
transform: translateY(-50%);
color: #888;
font-weight: bold;
}
.calc-btn {
grid-column: 1 / -1;
background-color: #27ae60;
color: white;
border: none;
padding: 15px;
font-size: 18px;
font-weight: bold;
border-radius: 4px;
cursor: pointer;
transition: background-color 0.3s;
margin-top: 10px;
width: 100%;
}
.calc-btn:hover {
background-color: #219150;
}
.results-section {
grid-column: 1 / -1;
background-color: #fff;
border: 1px solid #eee;
border-radius: 6px;
padding: 20px;
margin-top: 20px;
display: none;
}
.result-row {
display: flex;
justify-content: space-between;
align-items: center;
padding: 10px 0;
border-bottom: 1px solid #f0f0f0;
}
.result-row:last-child {
border-bottom: none;
margin-top: 10px;
padding-top: 15px;
border-top: 2px solid #2c3e50;
font-size: 1.2em;
font-weight: bold;
color: #2c3e50;
}
.result-label {
color: #666;
}
.result-value {
font-weight: 700;
color: #333;
}
.calc-article {
background: #fff;
padding: 20px;
}
.calc-article h2 {
color: #2c3e50;
border-bottom: 2px solid #3498db;
padding-bottom: 10px;
margin-top: 30px;
}
.calc-article h3 {
color: #34495e;
margin-top: 25px;
}
.calc-article p {
margin-bottom: 15px;
color: #555;
}
.calc-article ul {
margin-bottom: 20px;
padding-left: 20px;
}
.calc-article li {
margin-bottom: 10px;
color: #555;
}
function calculateMortgage() {
// Get Input Values
var homePrice = parseFloat(document.getElementById('homePrice').value);
var downPayment = parseFloat(document.getElementById('downPayment').value);
var interestRate = parseFloat(document.getElementById('interestRate').value);
var loanTermYears = parseFloat(document.getElementById('loanTerm').value);
var annualTax = parseFloat(document.getElementById('propertyTax').value);
var annualInsurance = parseFloat(document.getElementById('homeInsurance').value);
var monthlyHOA = parseFloat(document.getElementById('hoaFees').value);
// Validation
if (isNaN(homePrice) || isNaN(downPayment) || isNaN(interestRate) || isNaN(loanTermYears)) {
alert("Please enter valid numbers for all fields.");
return;
}
// Calculations
var principal = homePrice – downPayment;
var monthlyInterestRate = interestRate / 100 / 12;
var numberOfPayments = loanTermYears * 12;
// Monthly Principal & Interest (PI)
var monthlyPI = 0;
if (interestRate === 0) {
monthlyPI = principal / numberOfPayments;
} else {
// Formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
var x = Math.pow(1 + monthlyInterestRate, numberOfPayments);
monthlyPI = (principal * x * monthlyInterestRate) / (x – 1);
}
// Monthly Tax and Insurance
var monthlyTax = annualTax / 12;
var monthlyInsurance = annualInsurance / 12;
// Total Monthly Payment
var totalMonthly = monthlyPI + monthlyTax + monthlyInsurance + monthlyHOA;
// Format Currency
var formatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
minimumFractionDigits: 2
});
// Update DOM
document.getElementById('resPI').innerText = formatter.format(monthlyPI);
document.getElementById('resTax').innerText = formatter.format(monthlyTax);
document.getElementById('resIns').innerText = formatter.format(monthlyInsurance);
document.getElementById('resHOA').innerText = formatter.format(monthlyHOA);
document.getElementById('resTotal').innerText = formatter.format(totalMonthly);
// Show Results
document.getElementById('result').style.display = 'block';
}
Mortgage Payment Calculator
$
$
%
#
$
$
$
Principal & Interest:
$0.00
Monthly Property Tax:
$0.00
Monthly Home Insurance:
$0.00
Monthly HOA:
$0.00
Total Monthly Payment:
$0.00
Understanding Your Mortgage Payment
Purchasing a home is one of the most significant financial decisions you will ever make. While the listing price of a home is important, the monthly mortgage payment is often the critical factor in determining affordability. Our Mortgage Payment Calculator helps you estimate your total monthly housing costs by breaking down the specific components of a loan.
What is Included in a Mortgage Payment?
A standard monthly mortgage payment is typically composed of four main parts, commonly referred to by the acronym PITI:
- Principal: The portion of your payment that goes toward paying down the original amount of money you borrowed. In the early years of a loan, this amount is small, but it increases over time.
- Interest: The cost of borrowing money from your lender. Interest makes up the bulk of your payment in the early years of a standard amortization schedule.
- Taxes: Property taxes assessed by your local government. Lenders often collect this monthly and hold it in an escrow account to pay the tax bill when it is due.
- Insurance: Homeowners insurance protects your property against damage. Like taxes, this is often collected monthly in escrow. If your down payment is less than 20%, you may also have to pay Private Mortgage Insurance (PMI).
How Interest Rates Affect Your Buying Power
Even a small fluctuation in interest rates can significantly impact your monthly payment. For example, on a $300,000 loan, a 1% increase in interest rate can increase your monthly payment by hundreds of dollars. It is crucial to check current market rates and input them accurately into the calculator to get a realistic estimate.
The Impact of the Loan Term
The loan term is the length of time you have to repay the loan. The most common terms are 15 years and 30 years.
- 30-Year Fixed: Offers lower monthly payments because the principal repayment is spread out over a longer period, but you will pay significantly more in total interest over the life of the loan.
- 15-Year Fixed: Requires higher monthly payments, but you build equity much faster and pay far less in total interest.
Use the calculator above to compare different scenarios. Adjust the "Loan Term" and "Down Payment" fields to see how they change your "Total Monthly Payment."