Real Estate.com Home Loan Calculator

Use this home loan calculator to estimate your monthly mortgage payments, loan-to-value ratio, and total interest paid. Enter your home price, down payment, interest rate, and loan term to get accurate calculations.

How the Home Loan Calculator Works

The home loan calculator helps you estimate your monthly mortgage payments based on the principal loan amount, interest rate, and loan term. It calculates both the principal and interest portions of each payment, showing you how much you'll pay over the life of the loan.

This calculator uses the standard amortization formula for fixed-rate mortgages. It does not account for prepayment penalties, property taxes, or insurance costs.

Key Terms

Principal: The amount borrowed for the home purchase.
Down Payment: The portion of the home price paid upfront (typically 3-20%).
Interest Rate: The annual percentage rate charged by the lender.
Loan Term: The length of the mortgage in years.
Monthly Payment: The amount paid each month including principal and interest.
Total Interest: The cumulative interest paid over the life of the loan.
Loan-to-Value (LTV): The ratio of the loan amount to the home's appraised value.

How to Use the Calculator

Enter the home price in dollars.
Enter your down payment amount or percentage.
Input the annual interest rate (APR).
Select the loan term in years.
Click "Calculate" to see your estimated monthly payment and other details.

Formula Used

The calculator uses the standard mortgage payment formula:

M = P [ i(1 + i)ⁿ ] / [ (1 + i)ⁿ - 1 ]

Where:

M = Monthly payment
P = Principal loan amount (Home Price - Down Payment)
i = Monthly interest rate (Annual Rate / 12 / 100)
n = Number of payments (Loan Term in years × 12)

The formula calculates the fixed monthly payment for a loan with a fixed interest rate. It accounts for both the principal and interest portions of each payment.

Worked Example

Let's calculate a monthly payment for a $300,000 home with a 20% down payment, 4.5% annual interest rate, and 30-year loan term.

Input	Value
Home Price	$300,000
Down Payment	20% ($60,000)
Loan Amount	$240,000
Annual Interest Rate	4.5%
Loan Term	30 years

Using the formula:

Monthly interest rate = 4.5% / 12 = 0.00375

Number of payments = 30 × 12 = 360

Monthly payment = $240,000 [ 0.00375(1 + 0.00375)³⁶⁰ ] / [ (1 + 0.00375)³⁶⁰ - 1 ]

Monthly payment ≈ $1,432.29

Over 30 years, you would pay approximately $515,624 in total payments, with $115,624 going toward interest.

Frequently Asked Questions

What is a good down payment percentage for a home loan?

A good down payment typically ranges from 3% to 20% of the home price. A larger down payment reduces your loan amount and monthly payments, but requires more upfront cash. Conventional loans often require at least 3%, while FHA loans may allow as little as 3.5%.

How does the interest rate affect my monthly payment?

A higher interest rate increases your monthly payment because more of each payment goes toward interest. For example, increasing the interest rate from 4% to 5% on a $200,000 loan with a 30-year term would increase your monthly payment by about $100.

What is the difference between APR and interest rate?

The interest rate is the cost of borrowing, while the APR (Annual Percentage Rate) includes additional fees like mortgage insurance and points. The APR is typically higher than the interest rate and provides a more accurate picture of the total cost of borrowing.

Can I pay off my mortgage early without penalties?

Most conventional mortgages allow prepayment without penalties. However, some loans may have prepayment penalties or require you to pay the remaining balance in full. Always check your loan agreement or contact your lender before making extra payments.