Mortgage Calculator
Estimate your monthly mortgage payment in seconds — right in your browser. This free mortgage calculator shows your monthly principal and interest based on your loan amount, interest rate, and term, and can factor in property taxes, home insurance, and PMI for a full picture. Adjust any value and see your payment update instantly, along with the total interest you'll pay over the life of the loan. It's perfect for homebuyers comparing options and budgeting with confidence. Everything runs locally on your device — nothing you enter is uploaded or stored.
About Mortgage Payments
- A mortgage payment is what you repay each month toward a home loan, and it's built from more than just the amount you borrowed. The core is principal and interest, calculated from your loan amount, interest rate, and term using a standard amortization formula. Many payments also include property taxes, homeowners insurance, and — if your down payment is under 20% — private mortgage insurance (PMI), together often called PITI. Early payments go mostly toward interest, shifting toward principal over time. Understanding these parts helps you budget accurately. We built this calculator to make those estimates instant and clear, computed entirely in your browser.
How to Calculate a Mortgage Payment
It's simple. Enter your loan amount, annual interest rate, and loan term in years. The calculator applies the standard amortization formula and instantly shows your monthly principal and interest. Add optional figures — property taxes, home insurance, and PMI — for a full estimated monthly payment. You'll also see the total interest and total cost over the life of the loan. Adjust any value to compare scenarios in real time. Every calculation happens in your browser, so nothing you enter is sent to a server.
Common Mistakes to Avoid
❌ Budgeting only for principal and interest
✓ Solution:
Your real monthly payment usually also includes property taxes, homeowners insurance, and sometimes PMI or HOA fees. Add these in so your estimate reflects what you'll actually pay, not just the loan portion.
❌ Ignoring how loan term changes total cost
✓ Solution:
A longer term lowers your monthly payment but greatly increases total interest paid. Compare a 15-year and 30-year term side by side to see the trade-off between monthly affordability and lifetime cost.
❌ Overlooking PMI on low down payments
✓ Solution:
Putting down less than 20% typically adds private mortgage insurance to your payment. Factor PMI in when your down payment is small, and remember it can often be removed once you build enough equity.
❌ Confusing interest rate with APR
✓ Solution:
The interest rate covers just the loan, while APR includes certain fees and better reflects the true yearly cost. When comparing lender offers, compare APRs, not just headline rates.
❌ Treating the estimate as a final quote
✓ Solution:
A calculator gives a close estimate, but your actual payment depends on your credit, exact rate, taxes, and lender terms. Use it for planning and comparison, then confirm real figures with a lender before committing.
Frequently Asked Questions
It's based on your loan amount, interest rate, and loan term using a standard amortization formula that spreads principal and interest evenly across every month. Property taxes, homeowners insurance, and PMI are then added on top. This calculator does the math instantly as you enter your numbers.
Many payments also include property taxes, homeowners insurance, and private mortgage insurance (PMI) if your down payment is under 20%, sometimes plus HOA fees. Together, principal, interest, taxes, and insurance are often called PITI. Adding them gives a realistic monthly total.
A longer term, like 30 years, lowers your monthly payment but means you pay much more interest overall. A shorter term, like 15 years, raises the monthly payment but cuts total interest significantly. Comparing terms shows the balance between monthly cost and lifetime cost.
PMI, or private mortgage insurance, is usually required when your down payment is less than 20% of the home price. It protects the lender, adds to your monthly payment, and can often be canceled once you've built around 20% equity in the home.
It gives a close estimate for planning and comparison, but your real payment depends on your credit, the exact rate offered, local tax rates, insurance costs, and lender fees. Use it to budget and compare options, then confirm precise figures with a lender.
Mortgage Calculator — Free Online Tool to Estimate Monthly Payments, Interest & Total Loan Cost
A mortgage calculator that shows what a home loan will really cost each month and over time. Enter your loan amount, interest rate, and loan term, and it instantly calculates your monthly principal and interest payment. Add property taxes, homeowners insurance, and PMI to see a complete estimated monthly payment rather than just the base figure. The calculator also reveals the bigger picture: the total interest paid over the life of the loan and the total amount you'll repay, so you can see how rate and term affect the true cost. Change any input to compare scenarios — a shorter term, a larger down payment, or a lower rate — and watch the numbers update in real time. Because every calculation runs locally in your browser, nothing you enter is uploaded, logged, or stored. That makes it a private, dependable tool for homebuyers budgeting, comparing loan offers, and planning with confidence before talking to a lender.
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