Mortgage Calculator
Calculate your monthly mortgage payments.
Frequently Asked Questions
What does the mortgage calculator compute?
It calculates your monthly payment, total interest paid over the life of the loan, and provides a year-by-year amortization breakdown showing principal vs. interest split.
What inputs do I need?
Enter the loan amount, interest rate (annual), and loan term in years. Optionally add extra monthly payments to see how they reduce total interest and shorten the loan.
What is an amortization schedule?
An amortization schedule is a table showing each monthly payment split into principal and interest portions, along with the remaining balance after each payment.
Can I see the effect of extra payments?
Yes. Enter an extra monthly payment amount, and the calculator shows how much interest you save and how many months earlier the loan is paid off.
Is this calculator free?
Yes, ToolDock's mortgage calculator is completely free, requires no signup, and runs entirely in your browser.