Mortgage Calculator
Free online mortgage calculator — estimate monthly payments, total interest, and see your amortization schedule. Supports 15, 20, and 30-year fixed loans.
How the Mortgage Calculator Works
This mortgage calculator estimates your monthly payment based on the loan amount, interest rate, and loan term. It uses the standard amortization formula:
Where M is your monthly payment, P is the loan principal (home price minus down payment), r is the monthly interest rate (annual rate divided by 12), and n is the total number of payments.
Example Calculation
For a $300,000 home with 20% down ($60,000), a 6.5% interest rate, and a 30-year term:
- Loan amount: $240,000
- Monthly payment: $1,516.76
- Total interest paid: $146,034
- Total cost: $386,034
Understanding Your Amortization
In the early years of your mortgage, most of your payment goes toward interest. Over time, a larger portion goes toward the principal. A 15-year loan saves significantly on total interest but has higher monthly payments compared to a 30-year loan.