Estimate your monthly mortgage payments. Customize down payment, interest rate, term, taxes, insurance, and HOA fees to see a detailed visual breakdown of your costs and a complete amortization schedule.
Amortization Schedule
| Period | Payment | Principal Paid | Interest Paid | Total Interest | Remaining Balance |
|---|
Key Features of Mortgage Calculator
- Down Payment Toggle Seamlessly switch between entering a fixed dollar amount or a percentage of the home value.
- Property Tax & Insurance Integration Include property taxes, homeowners insurance, and HOA fees to calculate your true monthly out-of-pocket payment (PITI).
- Interactive Amortization Table Toggle between yearly and monthly amortization views to see exactly how your balance decreases over time.
- Visual Payment Breakdown See a beautiful, dynamic CSS donut chart showing exactly how your money is divided between principal, interest, taxes, and fees.
Mortgage Calculator Examples
Calculating a Standard 30-Year Mortgage
Estimate monthly cost for a $400,000 home with 20% down at 6.5% interest.
Input
Home Price: $400,000, Down Payment: 20% ($80,000), Term: 30 Years, Interest Rate: 6.5%Output
Monthly Principal & Interest: $2,022.62. Total Payments over 30 Years: $728,143.20. Total Interest: $408,143.20.How to Use Mortgage Calculator
-
1. Enter Loan Parameters
Enter the home price, down payment (as an amount or percentage), interest rate, and loan term.
-
2. Add Optional Expenses
Optionally add the annual property tax rate, home insurance cost, and monthly HOA fees for a complete monthly cost picture.
-
3. Review Breakdown & Schedule
Review the monthly PITI breakdown chart, total interest paid, and toggle the amortization schedule between yearly and monthly views.
Common Use Cases for Mortgage Calculator
- Home Buying Budgeting Estimate your monthly PITI payments for different price points to see what homes fit your budget.
- Comparing Loan Terms Compare a 15-year term against a 30-year term to see how much interest you will save.
- Evaluating Down Payment Scenarios See how increasing your down payment lowers your monthly cost and lifetime interest.
The Technical Details
The Mortgage Calculator uses standard financial compounding equations running client-side. The monthly payment is calculated using the formula: M = P * [r(1+r)^n] / [(1+r)^n - 1], where P is the loan principal (home price minus down payment), r is the monthly interest rate, and n is the total number of monthly payments. All calculations are executed locally in the browser to ensure absolute user privacy.
Frequently Asked Questions
What does the monthly payment include?
The calculator shows Principal & Interest (P&I) plus any property tax, home insurance, and HOA fees you enter. These four components together are commonly called PITI.
What is PMI and is it included?
PMI (Private Mortgage Insurance) is typically required when the down payment is below 20%. This calculator does not include PMI — factor in roughly 0.5–1% of the loan per year if applicable.
Is my data sent to a server?
No. All calculations run locally in your browser. Your financial information is never uploaded or stored anywhere.
What is the difference between a 15-year and 30-year mortgage?
A 15-year mortgage has higher monthly payments but significantly lower total interest paid. A 30-year mortgage lowers monthly payments but costs substantially more in interest over the full term.