How to Use the Mortgage Calculator

Our free mortgage calculator helps you estimate your monthly mortgage payments and understand the total cost of your home loan. Simply enter your loan amount, interest rate, and loan term to get instant results. You can also add extra monthly payments and one-time fees to see how they affect your total cost and payoff timeline.

Start by entering the total loan amount — this is the price of the home minus your down payment. Then set the annual interest rate offered by your lender. Choose your loan term (commonly 15 or 30 years). The calculator instantly shows your monthly payment, total payment over the life of the loan, total interest paid, and the Annual Percentage Rate (APR) which includes fees.

Use the "Extra Monthly Payment" field to see how making additional payments can save you thousands in interest and shorten your loan term. The amortization chart visually shows how your remaining balance decreases over time, and the full amortization schedule table breaks down each monthly payment into principal and interest portions.

You can export your results as PDF, CSV, or PNG for your records, or copy the summary to your clipboard. All calculations happen entirely in your browser — your financial data never leaves your device.

Understanding Mortgages and Home Loans

A mortgage is a loan used to purchase real estate, where the property itself serves as collateral. Mortgages are typically the largest financial commitment most people make, so understanding how they work is crucial for making informed decisions. The two main components of a mortgage payment are principal (the amount you borrowed) and interest (the cost of borrowing).

Fixed-rate mortgages keep the same interest rate throughout the entire loan term, making your monthly payments predictable. Adjustable-rate mortgages (ARMs) start with a lower rate that can change periodically based on market conditions. Most homebuyers choose fixed-rate mortgages for the stability they provide, especially during periods of low interest rates.

The amortization schedule shows exactly how each payment is split between principal and interest. In the early years of a mortgage, most of your payment goes toward interest. As you progress through the loan term, a larger portion goes toward reducing the principal balance. This is why making extra payments early in the loan term can have a dramatic impact on total interest paid.

The APR (Annual Percentage Rate) is often higher than the stated interest rate because it includes additional costs like origination fees, points, and other charges. Comparing APRs between different loan offers gives you a more accurate picture of the true cost of borrowing than comparing interest rates alone.

When shopping for a mortgage, consider the total cost over the life of the loan rather than focusing solely on the monthly payment. A 30-year mortgage has lower monthly payments than a 15-year mortgage, but you will pay significantly more in total interest. Use this calculator to compare different scenarios and find the loan structure that best fits your financial goals.

Frequently Asked Questions

Tips for Getting the Best Mortgage

• Improve your credit score before applying — even a small increase can qualify you for a lower interest rate, saving thousands over the life of the loan.
• Save for a larger down payment — putting down 20% or more eliminates the need for private mortgage insurance (PMI), reducing your monthly costs.
• Compare offers from multiple lenders — rates and fees can vary significantly. Get at least 3-4 quotes and compare APRs, not just interest rates.
• Consider the total cost — a lower monthly payment does not always mean a better deal. Compare the total amount paid over the life of different loan options.
• Lock your rate — once you find a good rate, ask your lender about rate locks to protect against increases during the closing process.
• Budget for additional costs — property taxes, homeowner's insurance, HOA fees, and maintenance costs add to your total housing expenses beyond the mortgage payment.