.calculator-container-wp {
max-width: 800px;
margin: 20px auto;
font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
background: #f9f9f9;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0,0,0,0.05);
border: 1px solid #e0e0e0;
}
.calculator-title {
text-align: center;
color: #2c3e50;
margin-bottom: 25px;
font-size: 28px;
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;
color: #555;
font-size: 14px;
}
.input-wrapper {
position: relative;
}
.input-wrapper input {
width: 100%;
padding: 12px 15px 12px 35px; /* space for symbol */
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.3s;
}
.input-wrapper input:focus {
border-color: #3498db;
outline: none;
}
.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;
margin-top: 10px;
transition: background-color 0.2s;
text-transform: uppercase;
}
.calc-btn:hover {
background-color: #219150;
}
.results-section {
grid-column: 1 / -1;
background: #fff;
padding: 20px;
border-radius: 6px;
border: 1px solid #eee;
margin-top: 20px;
display: none; /* Hidden by default */
}
.results-header {
text-align: center;
font-size: 20px;
font-weight: bold;
color: #2c3e50;
margin-bottom: 20px;
border-bottom: 2px solid #f0f0f0;
padding-bottom: 10px;
}
.result-row {
display: flex;
justify-content: space-between;
margin-bottom: 12px;
padding-bottom: 12px;
border-bottom: 1px dashed #eee;
}
.result-row:last-child {
border-bottom: none;
margin-bottom: 0;
padding-bottom: 0;
}
.result-label {
color: #666;
font-size: 15px;
}
.result-value {
font-weight: bold;
color: #2c3e50;
font-size: 16px;
}
.main-result {
font-size: 24px;
color: #27ae60;
}
.error-msg {
color: #e74c3c;
text-align: center;
margin-top: 10px;
font-weight: bold;
display: none;
}
.article-content {
margin-top: 40px;
padding-top: 20px;
border-top: 1px solid #ddd;
line-height: 1.6;
color: #333;
}
.article-content h2 {
font-size: 22px;
color: #2c3e50;
margin-top: 30px;
margin-bottom: 15px;
}
.article-content p {
margin-bottom: 15px;
}
.article-content ul {
margin-bottom: 15px;
padding-left: 20px;
}
.article-content li {
margin-bottom: 8px;
}
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 loanTerm = parseFloat(document.getElementById("loanTerm").value);
var propertyTax = parseFloat(document.getElementById("propertyTax").value);
var homeInsurance = parseFloat(document.getElementById("homeInsurance").value);
// Error Handling Display
var errorDiv = document.getElementById("errorDisplay");
var resultsDiv = document.getElementById("resultsSection");
// Basic Validation
if (isNaN(homePrice) || isNaN(downPayment) || isNaN(interestRate) || isNaN(loanTerm) ||
homePrice <= 0 || loanTerm home price
if (principal 0 && monthlyRate > 0) {
// Amortization Formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
monthlyPrincipalInterest = principal * (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1);
} else if (principal > 0 && monthlyRate === 0) {
// 0% interest case
monthlyPrincipalInterest = principal / numberOfPayments;
}
// Monthly Tax and Insurance
var monthlyTax = propertyTax / 12;
var monthlyInsurance = homeInsurance / 12;
// Total Monthly Payment
var totalMonthlyPayment = monthlyPrincipalInterest + monthlyTax + monthlyInsurance;
// Total Loan Cost metrics
var totalInterest = (monthlyPrincipalInterest * numberOfPayments) – principal;
if (totalInterest < 0) totalInterest = 0;
var totalCost = principal + totalInterest;
// Display Results
// Helper function for currency formatting
var formatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
minimumFractionDigits: 2
});
document.getElementById("resPrincipalInterest").innerHTML = formatter.format(monthlyPrincipalInterest);
document.getElementById("resTax").innerHTML = formatter.format(monthlyTax);
document.getElementById("resInsurance").innerHTML = formatter.format(monthlyInsurance);
document.getElementById("resTotalMonthly").innerHTML = formatter.format(totalMonthlyPayment);
document.getElementById("resLoanAmount").innerHTML = formatter.format(principal);
document.getElementById("resTotalInterest").innerHTML = formatter.format(totalInterest);
document.getElementById("resTotalCost").innerHTML = formatter.format(totalCost);
// Show results container
resultsDiv.style.display = "block";
}
Mortgage Payment Calculator
$
$
%
#
$
$
Please enter valid positive numbers for all fields.
Payment Breakdown
Principal & Interest (Monthly):
$0.00
Property Tax (Monthly):
$0.00
Home Insurance (Monthly):
$0.00
Total Monthly Payment:
$0.00
Total Loan Amount:
$0.00
Total Interest Paid over Life of Loan:
$0.00
Total Cost of Loan (Principal + Interest):
$0.00
Understanding Your Mortgage Payment
Purchasing a home is one of the most significant financial decisions you will make. This Mortgage Payment Calculator is designed to help you understand exactly how much your monthly payments will be, ensuring there are no surprises when you sign your loan documents.
While many calculators only show the principal and interest, true affordability depends on the "PITI" calculation: Principal, Interest, Taxes, and Insurance. Our tool includes these crucial variables to give you a realistic monthly budget.
How Your Payment is Calculated
The calculation involves several key components:
- Principal & Interest: This is calculated using the standard amortization formula based on your loan amount, interest rate, and term length. In the early years, most of this payment goes toward interest.
- Property Taxes: Local governments assess taxes on property value. This annual cost is typically divided by 12 and collected monthly by your lender to be held in escrow.
- Homeowners Insurance: Lenders require insurance to protect the asset. Like taxes, this annual premium is often broken down into monthly installments.
Example Scenario
Let's look at a realistic example. If you purchase a home for $350,000 with a 20% down payment ($70,000), your loan amount will be $280,000.
Assuming a 30-year fixed rate of 6.5%:
- Your Principal & Interest payment would be approximately $1,770 per month.
- If annual property taxes are $4,500 ($375/month) and insurance is $1,200 ($100/month)…
- Your Total Monthly Payment would be roughly $2,245.
Using this calculator allows you to adjust these variables—such as increasing your down payment or securing a lower interest rate—to see how they impact your long-term financial health.